Can I roast in glass? All,

Recently we moved house, and took it as an excuse to ditch a bunch of old and dying roasting pans.

We kept some glass trays (suitable for cooking in) though, and have ended up using them for just about all our oven cooking. On the top I still use either the steel covered copper bottomed things or cast iron cookware, but in the over it's mainly the glass.

Everything seems to turn out just fine - am I missing something? Committing a heinous sin I've somehow forgotten? Do I need to run back to buying some proper metal roasting trays?
Dude you said you have cast iron. Cast iron rules. And it performs very well in the oven. No contest against glass and you can make pan sauce on the stove-top after the roasting is finished. My favorite pan to make roast chicken with is my 12" Lodge cast iron skillet. Glass is probably better at roasting than cheap cookie style sheets, because it keeps the heat distribution fairly smooth. But glass will not hold up well to heavy roasting use and will eventually ruin your dinner when it cracks or shatters. All Clad makes a great roasting pan with wire rack. But for most roasting a simple cast iron skillet works well and is indestructible.