I look forward to traveling to Massachusetts for a number of reasons, and On the Border is one of them. It's a great place for all ages, lively atmosphere and very popular on the weekends (so you will have to wait a while, but it's worth it). I'm not much of a drinker, but I do love their margharitas, especially one I was introduced to recently, a "watermelon margharita" with a big chunk of melon stuck on to the glass. It was just superb.
Prices are reasonable and even if you don't like spicy food, you will find something to your liking, e.g., the fajitas which I got that included steak and shrimp as well as the usual refried beans as a side. They also offer great combo deals so you can get a taste of each dish you like. I just wish On the Border was more readily accessible outside of Massachusetts (there is at least one in CT but not near us) because I would definitely be a regular there.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.