The Box is usually the busiest of the late-night bars in Headingley, and the crowds usually peak around 11PM, when the (much cheaper) pubs start kicking everyone out. While it's good that it gets so busy in terms of atmosphere and banter, it can sometimes get unpleasantly overcrowded, and you get the impression that the bouncers don't really care. Thus, getting a drink at the upstairs bar (the more lively area of The Box) usually takes a fair while.
The beers themselves are priced similarly to those in The Arc and Trio, but they do offer a nice selection of bottles here (Desperados obviously being the best) - although you'll be paying around £3.30 for a bottle. During the day, The Box serves reasonable food (the pizzas are probably the pick of the bunch) and is usually frequented by students playing pool and watching SkySports News, meaning there is always a good atmosphere in this place.
Overall, The Box is a good venue for ending the night if you can't be bothered with town, but it is equally good as a short stop on the way to town; it's a classy bar but also student friendly, which makes for a good atmosphere, and I'd particularly recommend it to anyone who smokes, as it has perhaps the best smoking terrace in Leeds. read more