Yes, all of our restaurant partners have hundreds if not thousands of reviews on Yelp. This will be hard to game. The only exception is the Mayo & Mustard Food Truck but they are 4.5 Stars and totally awesome.
Ike's is temporarily suspended (figuring out a few logistical kinks), but they are being re-opened very soon with more sandwiches to choose from as well.
A survey of our merchants have shown that ~75% of people who come in buy another dish. We spoke to our users and many are repeat users of Munch On Me (daily and weekly).