The glass is better than ever, even on the cheap panels. Mine survived a hail storm that took out hundreds of roofs in the area.
Discussion
How much was it for the whole system installed?
I'm in an RV trailer, so... It's all DIY.
Rates for installs vary greatly. Usually a minimum of $12k for a very minimal system installed, but...
That's on an existing roof that's structurally sound.