Product review (4 stars): Apartment MUST; an idea for wheels
I did not purchase this item from Amazon - in fact, I bought a used 3-year-old machine from an individual in my local area for less than $100.  But just thought I'd add a positive review here, comment on the functionality of a 3+ year old machine, and also offer an idea to those interested in installing wheels on their machine.

Overall, I love this machine and can't believe I lived so long in a top floor apartment without purchasing one!  The unit I purchased used has some minor dings and dents in the outer casing which the seller said were there from the time he purchased it new online and removed it from the original packaging.  Also, somewhere in his three years of use, the indicator light for the "Power Wash" cycle burned out - so you have to use common sense to figure out when the machine is programmed to use "Power Wash" rather than relying on the indicator light alone (this is not hard to do).  But as far as basic function, the durability of all main components and parts, etc. - so far the machine looks to be holding up perfectly and running perfectly.  I have done 10 loads so far in the few days I've owned it - not one problem.  Only one load became unbalanced, and I think its because at the end of my 10 loads I got curious about how much the machine could really hold, and loaded a bit too many things into there :)  But even as I was doing it I knew I was pushing the limit!

Just for an idea of the machine's capacity - I was able to wash in one load:
a full set of queen sized sheets (fitted, flat, 2 pillowcases)
Two full size bath towels and two hand towels
Two days worth of women's clothing (medium) - two pairs slacks, two tops, 1 pair pajamas, and undergarments/socks

I used an HE, organic/eco-friendly detergent, and did quick washes on everything - all my items came out smelling and looking very clean.

Now, for an idea about how to put some wheels on the machine.  A word of warning - this is not a factory installation, so proceed your own risk!
I searched for the caster kit online but couldn't find them from a reliable-looking source.  The holes at the bottom of the machine for the rubber feet are 3/8" diameter.  Only the hole for the leveling leg is threaded - the others are not.
I went to a local big-box home improvement shop in my city, and though I couldn't find any 3/8" stem casters, I did find some 5/16" screw casters for $3 apiece.  I also purchased a pack of machine nuts, lock washers and flat washers for about $2.  I came home, turned my machine on its front, unscrewed the bottom panel, and took out the rubber feet.  I then installed the wheels I purchased with a flat washer on each side, and a lock washer and machine nut in the inner side.  For the leveling leg, I had to experiment a little - I added an extra nut on the outside, and had to turn the machine upright and use my level a few times before I got it to the proper height.  But these wheels are now very firmly in place on the machine.  Though the casters I purchased are not the locking type, I have a small, squre rubber mat (like a yoga mat) cut to 18"x18", that I roll the machine onto prior to running it.  I was already using this mat before the wheel install, just to cut down on vibration - but discovered that the friction of the wheels against the rubber renders the machine unable to move even during the spin cycles.  Sweet!  So, total price of my wheel install = about $14.  And if you can salvage a rubber mat, or find one for sale used at a thrift store, etc., even better.  Just an idea I thought I'd share for anyone out there interested in putting their machine on wheels.

In summary - very happy with this machine, despite some minor cosmetic flaws that seem to be a function of its 3 years of use.  Even happier now that I've got it on wheels, and was able to do so inexpensively and without having to order the parts which are hard to come by online.