My travel pro lasted 2 years of 121 line flying (non-commuter). My PNT bag has lasted 6 years of flying (3 yrs post 9/11 part 121 and 2 part 91 corporate). I would buy another PNT in a heartbeat (but I don't need to... mine still looks as good as new except for 1 or 2 bent zipper pulls, a few scratches and a missing screw or two from the frame.) And if I stopped by a stopover store in IAH, MSP, or DTW, they'd replace the screws for free in 5 minutes...