I use Thrive amps for the past 4.5 years.
It has been very reliable, in fact, 3 of the brand new Crown 3600 vz went down within the first year.
I had the power switch replaced 2 times on one of the Thrive amps, and I got the parts free of charge within a week!
I like Thrive product and its perfect for my use.
But I can also understand what other people were saying about there is no specs on these amps.