For those who seek irregular and adventurous pie concoctions this is the place to go. Always with an array of choices Ian's will cater to those seeking something basic and those looking to pile as much potato, green onions, barbecue sauce, and bacon on as possible.
A bit better value than area rival Casa de Roma, and feeling design-decor cleaner as well as sanitary cleaner, the pizza to pizza comparison seems Ian's is a bit heavier filling and more exotic whereas Casa de Roma is more New Yorkesque whose specialties extend to safer choices like spinach and feta. I suppose, if the latter is your preference than it should be your destination. But, for those looking to pile it on and enjoy the flavors and variety Ian's dominates.
My one complaint would be the State Street location could use more tables in the secondary room as there is much wasted space in the center of the room and the place is frequently full during lunches and late nights.
Side note: For added complimentary value they now have available bottles of ranch, bbq, and hot sauce for all your dipping needs. And fyi they offer a 20 inch monster cheese pie on weekend late nights for only 10 dollars! It just keeps getting better and better.