Mine are Turbo Technics and I have never had a single problem in 3 years. Exhaust Gas Temperature never goes above 840 degrees even on long uphill, high boost pulls.
I run the car daily on 1.1 - 1.15bar and it is quicker than our vvti BPU 6 speed supras running 1.2 bar.
Also, as a bit of a sidenote, on the dyno we ran up to 1.3bar (to check fuelling was ok in case of an overboost situation) and the torque was still increasing at 1.3bar. Some people have found that running above 1.2bar yields less power and torque (as the turbos aren't operating efficiently at those levels) but my turbos seem efficient enough at 1.3bar.