I haven't ever had them bench tested, and I am sure they won't hit as high of numbers as most of the setups on here... but I am running two FUBR-12's and two LT980/2 and it sounds pretty freaking nice.. but nothing compaired to the setups on here!!! What subs are you trying to push with them??
Well, there's rarely a report of one failing. When the AxxxxdB amps came out they were pretty popular and got some respect -- doing something in the 2Kw range for around $300, apparently pretty reliably.
The biggest risk IMO is knowing how much "real" power you're going to get. The ratings are so inflated I think you're better off estimating by fuse size. The LFA has 200A, the other two have 150A. So I'd say 2000-2300, and 1500-1800.