Product review (5 stars): Essential.  Never want to be without this!
I purchased the PureWash system in May, 2012 and have purposely waited to write my review.

First, this is obviously a company that puts a lot of innovation and attention to detail into the product.  The packaging was outstanding. It includes the unit itself, instructions, a placement guide a small level and a small hammer.  I had also watched a YouTube video on installation (recommended) prior to receiving this so I was ready to go once it arrived.  Installation was simple and straightforward.  I have a standard washer.

Dirt and Grass stain test:  For the initial test, I took a white cotton dishtowel and ground in outside dirt and grass (I mean *really* ground this dirt into the cloth).  The intial wash of several minutes removed all of the dirt and made a significant dent in the grass stain.  Next, I used some detergent on the grass stain and tossed it in the washer again.  More stain came out, but not all.  Grass is a tough test. I also ground in more fresh grass and pre-treated it with regular detergent.  This worked better than without detergent.  I do not wash kids' clothes, so I can't speak to those particular challenges or stains, but would like to hear feedback on that if anyone can add a comment.

My first gas bill came in with a savings of over $30, and continues to save at least that much each month.  Those savings combined with the savings from not buying laundry soap or fabric softener and I this should be paid off in savings within a year or so.  I addded the purchase cost of some natural soap nuts liquid to this estimate.

Everything else:  I loved the results immediately.  It took me some time to break the detergent/fabric softener habit.  I continued to use a small amount of both for a while (until I ran out).  What I discovered was interesting and unexpected.  What I found is that the more I used PureWash on my clothes, the better they came out.  At first, some clothes felt stiff and artificial, so I used fabric softener.  Many loads later the opposite occurs: if I add fabric softener the clothes feel stiff and waxed.  This might be a re-learning process of what "naked" laundry feels like, but I think it also is a process of getting residue junk out of the clothes, and that this process takes numerous washings.  It took my towels the longest to start coming out feeling right. Whites are whiter, colors are brighter (no fading).

Note:  I still use "detergent" every once in a while - I use a small amount of a soap nuts liquid. Soap nuts are a product that come from trees and have natural saponins.  Also, if it is something like my gym towels that are stale from being in a locker, I add a capful or two of bleach.

The other thing I do sometimes is just put the cycle on "pre-wash" and that's it.  It is like an intense rinse if something needs to sit in the PureWash-treated water.  No more extra rinses, sometimes just a wash if I catch the machine at the right time to bypass the buit-in rinse cycle.

One of the best parts?  When I gave a friend a hug a few weeks ago she said, "Wow! What do you wash your clothes with?  They smell great!"