I'll take Glock every day of the week and twice on Sundays. A Glock is a handful of reliable. Sigs are prone to malfunction when dirty or when the shooter isn't doing his part and locking it in just right.

My wife and I are both retired LEOs and she is a Sig fan so this subject has come up in our house once or twice. I've done plenty of shooting with both and I stick to my guns (no pun) on my opinion about which is the better.