Snapped one up for the unbelievable low price of $40 at a local hamfest, thinking it would probably not work and would at the least require a battery replacement. Would you believe it turned out everything works like a champ! I already had a smartUPS model 1000XL which still serves me well.
Lots of power; long runtime; good remote management and diagnostics possible with free software
New they are a bit pricey