I remember the first time I had a Dibella's sub. It was at the Robinson location and I ordered a medium cheesesteak with oil (always, always get the oil. It's not the same without it.)
My first impression was the size of the sub. A medium here would be a large anywhere else, the small a medium, and a large is meant for two people or two sittings. Then as I bit into my delectable treat, a smile crept onto my face. Yes, this sub made me smile. That is all I need to say about it's taste.
All in all, this is the best sub around. There is literally no way you can improve on perfection, which is shy this is literally the best sub I've ever had. But if you don't get the oil, you are short-changing yourself big time.