Product review (5 stars): Excellent
I had an opportunity to use this machine for 3 weeks during a camping trip in which we used it hard and frequent.  It worked excellent and I had no issues.  But I would like to augment my review by responding to the review below me...specifically the cons in which I had a totally different experience.

Cons:
* The machine is basically made of plastic. The manufacture says that it's made of the highest, most durable plastic, but at times the brackets do seem a bit wobbly. The washer itself seems sturdy. The base is questionable. Some of the small screw caps did not stay in place, but they are not essential to the unit staying together or washing properly.

It is completely sturdy and mine did not wobble at all.  Perhaps the reviewer did not set it up correctly as the machine needs to be put together properly.  They say plastic as if that is a bad thing, but this makes it lightweight and many things are made of plastic and sturdy...take a look at your car next time you're in it.

* Can be messy: Washing clothes in this unit is not the tidiest of processes. I initially tried it in my kitchen, but I spilled more water than I used, so I eventually move the unit to my bathtub and found that it fits perfectly and I don't have a problem with water being everywhere.

It can be, but ours was not.  This point is the fault of the reviewer and NOT the machine at all. Make sure you put the drain tube on correctly and into a sink and put the cap on tight and no issues.

* No assembly instructions: The unit does not come with a lot of instructions on how to put it together, but it's not that difficult to figure out. You are really only assembling the base not the tub. You really can look at the pieces laid out and see how it all fits together. It took me less than 10 minutes to unbox and assemble.

Now this one is ridiculous to me.  I have heard others say this.  I have put together Barbie stuff for my neice harder than this.  There are about 5 parts in total, I could have done it without ANY instructions at all.  I seriously have to laugh...if you can screw in a lightbulb you can do this.  Of course, we now need warnings on hot cups of coffee so one does not burn themselves... seriously...c'mon.

* Where the suction?: The unit does have suction cups for stability, but I have to say they stick the best when you don't need them to. When the water splashes, the suction cups tend to not stay in place. However, I've found when using the unit in the bathtub, this wasn't an issue. The unit did still slide around a bit but not enough to disrupt the washing process.

This one makes sense.  It does sometimes stick when you need to move it but you just pull up on the suction cup edges and wala!  But I get his meaning here...it is true.

* Bait and Switch: When I received my Wonder Wash I was surprised to find they sent me a Sputnik 3 that looks exactly like a Wonder Wash, but was renamed. I hadn't seen anything on their site claiming they renamed the units, so I was a little suspicious. However, the unit seems to do what the Wonder Wash claims to do, so I kept the unit. I can, however, see how other reviewers see this as a bait and switch and question the quality of the Sputnik 3 compared to the Wonder Wash. I can only speak for my unit and say that so far I haven't had any problems. I do think the manufacturer should really clear this up or stop sending out the Sputnik 3s as Wonder Wash.

I have heard this before as well and it did not happen to me.  I cannot comment therefore...but mine was the Wonderwash.  Make SURE you ask the seller first to send you the Wonderwash or do not buy it.

* Hard to Crank: When I first started using the unit, it was at times hard to crank. But, through trial and error, I found that the amount of water you use for the size of the load is every important. The instructions say that the smaller the load less water is needed, but I didn't necessarily find that to be the case all the time. I eventually found that over time you will be able to determine what the right clothes to water ratio is to make it crank smoothly. The right amount of water in the unit can make the cranking action effortless.

Not really.  I agree if you are 5 years old but it is NOT hard to crank.

* The Tricky Lid: The lid for the machine can be a little tricky. It's almost like working with a child-proof cap to get the right fit. The trick is to unscrew the lid all the way until you almost take the screw out. Place the lid on the unit and lock the lid in the groves around the unit. Hold the lid in place around the groves and then tighten screw back all the way down. By doing this, you get the tightest fit and therefore the most pressure and fewer leaks. When you loosen the lid after a wash, you should hear a hissing sound of the air releasing, then you know you had a good tight fit.

I am shaking my head.  This should not be a con at all.  It is not really like a child proof lid but you have to turn it and then screw it.  But this is also childsplay and very simple.  But I agree, if you are a 5 year old and you want to do this get someone to help you first.

* No Spin Cycle: Since this is not your typical washing machine with a spin cycle you will need to either ring your clothes dry by hand or do like I did and buy an Spin Dryer Centrifugal Clothes Portable Spin Dryer. As stated before I'm lazy when it comes to laundry, so wring out the clothes after washing would have been deal breaker in buying a Wonder Wash. The Spin Dryer completes the Wonder Wash.

Lazy is correct.  Did you see Kenmore or GE written on the side of the unit?  How about in any of their ads?  Where was it written that this thing ever had a spin cycle?  Nowhere...

So why out this in the cons?  That's like buying a a minivan and then scoring it lower because it is not able to do 0-60 in 3 seconds.  It was never promoted not sold to have a spin cycle so I am not sure why anyone has it on their list.  Yes, wring out the clothes...it takes a few minutes but so what.  Do not buy a manual machine if you are lazy.  But I suppose lazy and cheap are a bad combination.

This is a great machine and we were happy with it.  I expected to not like it considering some reviews and especially the one I quoted here...I am sooo happy I never listed.  it saved us money whiloe camping and was extremely convenient if we were staying at a campsite for at least 2 days.