I was also quite surprised by the low rating but the place looked clean and decent and close to my gate so I have it a shot.
I ordered guacamole with chips and make your own burger and a glass of Wayne Gretzky's Chardonnay since mojitos were not available today.
The guacamole tasted good and fresh.
The one mistake I did with burger was ordered a gluten free bun, which turned out to be 2 slices of gluten free bread vs. a bun. So while a little misleading, the burger tasted good and wasn't huge, which was a plus. The service was prompt. Great to know there is actually a decent place to eat at terminal 3. I usually fly from the other side of terminal (gates 1-9) so I had no idea there were other food options down at gate 13. Will definitely visit again!