First of all, their gluten free pasta is really good! It's yellow and made from corn. It's nearly unheard of to see an Italian restaurant (non-chain, chain, authentic or not) have a gluten free option. +1, seriously.
I've always liked the Spaghetti Factory. It's not the best but it is dirt cheap and they have so many cool decorations. I'm a sucker for old antique-y looking stuff.
The service can be slow and it's always busy, but hell...ALL Spaghetti Factories are this busy if not more. It's not an anomaly people. I'm just happy they have a call-ahead system so you don't have to wait for hours when you arrive.