Product review (5 stars): One year old and cloth diapers to Pennsic
14 Jun, 2014 - My wife and I camp at the two week long Pennsic War each year.  It's an SCA event with ~10k people in a single campsite, with limited access to laundry facilities.  Bought this in order to maintain our practice of using cloth diapers for our 1 year old son at war this year.  Tried it out once in the bathtub already and we were quite impressed with it's performance and ease of use.  Will post an updated review after the event with "real world" insight.

WARNING to the squeamish - diapers can be a dirty business.
12 Aug, 2014 - UPDATE!  After Pennsic this year I can give excellent reports on this washer! We made it through the entire length of our stay still using cloth diapers for our son.  We brought plenty of cotton diaper liners, had to wash in the WonderWash twice for diapers alone. (We washed some of our period garb as well, but we brought enough to last our trip, so this review will focus on our diapers) We also used wool diaper covers that my wife made out of sweaters from Goodwill. Brought along two 5 gallon buckets for water and for use as a "diaper pail" to soak the dirties in. Poopy diapers were scraped clean before soaking in the diaper pail, pee diapers were simply soaked.

A typical load was: ~20 cotton liners into the Wonderwash, a quarter capful of Ecover brand laundry detergent, and about 3 gallons of water. Cranked for about 2 minutes.  I didn't count turns or time (we were chatting while working.)  Attached the drain, loosened the lid and let it drain while I refilled my bucket. Come back, remove drain, fill with about 3 more gallons of water. Close lid and crank for another 2 minutes. Drain after rinsing.

We did 3 rinses for each load of diapers.  This was perhaps overkill, but considering they're diapers and next to super sensitive skin which seems to break out in a rash in the blink of an eye, we wanted to get them super clean.  Wringed to remove as much water as possible and then hung on a line behind our tent to dry.

Overall, the diapers came out VERY clean and well washed.  There were a few stains remaining from the diaper rash cream we use, but even the home washer doesn't get that out.  Line drying our diapers was another story however, the weather simply did not cooperate, and just as we were nearing complete dryness of the diapers, the skies opened up and poured rain down upon us.  Oh well!
We had enough liners to make it through until we could dry sufficiently; though we did get close to running out one day.

This washer comes with my highest recommendation for Pennsic.  I would compare it's wash cycle to a "gentle" cycle in a normal washer, so there is no fear about washing garb with delicate lace, trim, tassels or things like that.  It does take a bit of technique to get used to how fast to turn the crank.  You want to turn it fast enough to get some "sloshing" action going.  If you turn it too slowly all you're doing is flipping the clothes (possibly a super gentle wash.)  If you turn too quickly, the clothes all stay at one end and never slosh down (centrifugal force.)

I think I will peel off the stickers and paint the Wonderwash in browns and black with a faux wood finish, so that it will look less modern and anachronistic in our camp at Pennsic. I already painted our plastic buckets to look like wood.

Added bonus #1: Our son loved splashing & playing in the clean water bucket while I cranked!
Added bonus #2: The empty washer can store all of the critical laundry items, making for easy packing and organization.  We packed a bottle of detergent, clothespins and roll of clothesline all inside with room to spare.