Anyone ever used one of these? Had one? Seen one? etc? I have a 2k watt gas one that I bought like 6 years ago and have never had trouble with it but I don't like the idea of storing gas. Saw a 45 gallon propane tank on clist the other day for $100 bux didn't seem like a bad option. Here's an example: NEW PROPANE/LPG Gas 4000 WATT GENERATOR 4 KW - eBay (item 130336773779 end time Nov-10-09 18:52:27 PST) reviews on amazon about them all said they worked fine, some people complained about quality but nothing about functionally that I could find.