The MPS box might have a heavy synchro but that does not make it a bad box or prone to premature failure. If anything, that synchro is there to help protect the box, especially as it is loaded up with multiple rings in 1st and 2nd, even if it is a frustration to those who want to force-shift. I can understand a box quitting if the car is being launched and dragged a lot, and for which it was never designed, but otherwise I'd attribute failure more to mistreatment.
Partly in consideration of the box and transmission, I rarely get onto boost in 1st and only occasionally in 2nd and even that is only partial, say up to 10psi. But otherwise, my usual driving in traffic doesn't permit much more performance than this anyway. If I need to escape from traffic or catch up to almost anything, 3rd will reel them in faster than most cars around. Some cars with DSG boxes are proving tough to catch though but few can sustain the MPS6 blast right through the speed range!
CP_e Standback & PNP; CP_e 3" SS Downpipe; Corksport FMIC with Top-mount K&N filter & OEM Ram CAI; Turbosmart BOV; Dashhawk; Prosport Boost Guage; JBR solid shift bushes; DBA 4000 Wiper-Slot front rotors; Hawk Ferro-Carbon HPS Street front brake pads (@ 69,000km); Sumitomo HTRZIII's in 225/45 x 18