Just make sure it is a quality glass they are using as the replacement. Big names like Saint Gobain, Pilkington, PPG etc. offer high quality replacement glass. In most cases they are the same or better quality than OEM. Avoid the cheap crap.
Just as important is the guys doing the install. Make sure they are good and know what they are doing. Any monkey can install auto glass, the difference is in the quality of the install.