I owned an original Puma 1000. Really loved the amp, but had pot problems, in fact the master volume pot almost disintegrated internally at a rehearsal and I had to jam a piece of paper between the knob and the faceplate to get it to work. (the amp was only used by me and looked after carefully, with Puma soft bag). Tecamp were very good and replaced the pot, but it took a couple of months to get it back….so not too happy. After its return it was fine for a while, then I got crackling at a gig…one of the switches (think it was the mute) was the culprit, back to Tecamp, yes repaired free of charge, but another X week wait to get it back (they replaced all the pots and switches at my request). While it was away I bought a GB Shuttle 9 which I still have and use, because the only other amp I had was an iamp micro, which just wasn't loud enough.
Having said all that, I loved the sound from the Puma, and given Genz aren't made any more, if I had to buy another powerful micro amp, I think I'd give the Puma 900 a go.
I had good e-mail contact with one of the Tecamp staff, he was very helpful