I am going to start out by saying that I've loved Johnny McGuire's for years. They used to have a location in the town where I went to college (Durango, CO) and this used to be a common breakfast and lunch spot for me. With that in mind, I've only been to the Vegas location twice. However, I was transported back to my college years by the tastes and flavors of Johnny's. My favorites are the Johnny and the Buddha, and now that I don't eat meat, I usually load up on veggies and get sunflower seeds and cream cheese on the sandwich (as this really does make the sandwich).
The homemade chips are something I've only had at the Vegas location, and they were quite delicious, and a nice compliment to the sandwich.
I haven't found the poor customer service that others mention, but then again, I've only been to this location twice. Additionally, I do agree that the prices are high, but I find the quality of the ingredients to also be high. Don't get me wrong, I love me some Port of Subs and Capriotti's, but I've never had a sandwich as fresh as Johnny's at either of those two places. The closest comparison I've run across is Boardhouse, and they also have very high prices, and the sandwiches there just don't give me that same "pow" factor. For me Johnny's is not an ever day kind of sandwich, but really a sandwich treat for those days fighting crowds or the hangover shakes at Town Square. With that said, I am a proud Johnny McGuire fan, and will continue to patronize on those occasions I am at Town Square.