Union Summer seems much better than last years Front Street Foods in terms of vendor prep and wait times.
The most notable vendor is Eva's Original Chimneys! The hype is worth it.. definitely more of a cheat day snack..or an entire meal.. so delicious though.. will def be back a handful of times before the end of the summer!
I have also tried the lobster roll from Fresh off the Boat and it honestly wasn't that good, completely not worth it for $15.. I can walk down the street to Buster's at St. Lawrence Market and get something much more amazing for less!
Overall, the food is quite pricey and small portioned here, but the availibity of seats seems to be better than last year and they have occasional entertainment nights with live bands, etc on the stage.