Product review (1 stars): VERY POORLY DESIGNED & MADE!
I purchased this unit  in the Summer, two years ago.  I used it for one party, where it worked beautifully.  I then stored it away, until my next party 6 months later. (I host two major parties a year for about 90 people)  I plugged it in, filled the unit with water, pressed the appropiate buttons, and...NOTHING!  I repeated this sevearl times, trying all different things, to no avail!  As it was still under warranty, I called the vendor (Air & Water), who informed me I would have to pay for BOTH their shipping of a new unit ($17.00) as well as bearing the cost of shipping the broken one back to them!  After much complaining, and finally getting in touch with a supervisor, they allowed free shipping of the new one, but I'd still have to pay for the defective unit, and they woudn't send it out until they recieved the old one.
I recieved the new unit approx. four weeks later - it worked fine for my next party.  This time I did not pack it away, but let it sit on the shelf where it was used.  6 months later, I used it again, and, thankfully, it still worked.  Fast forward to last January;  I filled the unit with water, turned it on, and once again...NOTHING!  It did (or didn't, as the case may be ) the same damn thing as the first one!  Again, after trying multiple times to get it to work, I gave up!  Let me say this: When this unit works, it's phenomenal!  Unfortunately, it seems to have some sort of bug - if you don't use it continuously, it stops working altogether!  I WOULD DEFINITELY NOT RECOMMEND THIS UNIT, OR ANY OF ITS SIMILAR MODELS (under different names, but made by the same company!), nor would I ever do business with Air & Water ever again!  IF AMAZON ALLOWED, I WOULD GIVE THIS PEICE OF JUNK NO STARS!