I've heard that Pizza Sola is a chain, but I've never been to another one.
The stigma of chains aside, what a great neighborhood pizza shop. The decor is very nice, with lots of stainless steel tables and a nice seating area to eat-in. They have all the basic types of pizza, as well as some of the more unique (Hawaiin pizza is great), but overall this is just a good NY-style thinner-crust pizza shop.
What I love is that they're helping to populate the S. Highland - Penn Circle intersection along with Red Room.