ISUZU fixed both windows for me in the past. After they replaced the rails both windows went up straight/ fast. There was no problem with the regulator that I know of.

I just took it in and mentioned that it was "begining to start" binding again. They wanted to charge me for two hours of labor to adjust the regulator. Whatever they did made the widow worse (it goes up at an angle now).

What bothers me is that they fixed the problem once, shouldn't they figure out from that how to prevent the problem from recurring?