I just went through a bunch of research and estimates for replacing a sliding glass door. Ended up with Anderson, but it seems that many of the other top brands don't make a 12' wide, 4 panel sliding glass door.
Softlite, Sunrise and Okna seemed to be the most highly recommended by those in the trade. Marvin and Anderson were the second tier (cost more, not quite as good, but still good. No one recommended Pella.
I do have a Pella Storm door. The lock broke in the locked position, found out it is a known issue and that although it has been a known issue for years, they have not fixed the problem, but will sell you the exact same lock after you spend a few hundred dollars getting a locksmith to open your door.
Q