Betta Jerk is hidden in a secluded corner of a retail parking lot behind a Burger King. There's quite a few food options in this plaza, but they're mostly all chain restaurants (ex. Mr Greek, Extreme Pita).
Upon walking in, you'll see that the restaurant is closed-concept. High walls form a barrier between the dine-in and takeout area, and not much naturla light makes it into the restaurant. The walls lead you to directly to the takeout counter, where you'll often find a group of people standing around, either waiting to order or waiting for their order.
The scene described above is my major gripe with Betta Jerk - the waiting. If you go during the lunch rush, you can expect to spend most of your lunch break just waiting for your order to be made. Because of this, I wouldn't recommend Betta Jerk as a suitable lunch option unless you're willing to beat the traffic and order ahead of the rush. Even a handful of people ahead of you can take a while.
The food, though? It's pretty good. Nothing special, but worth the reasonable prices. It doesn't help that one of the GTA's best jerk restaurants (Portland Jerk) is right across the street, but in a vacuum, they make decently good jerk cuisine.