The cafeteria food is not generally regarded as being amazing cuisine. But the glory of BYU meal options is that you don't have to live on cafeteria food alone! BYU offers a couple of different meal plan options; the most popular (and slightly more expensive) option is Dining Plus. This option gives students a daily allowance that they can spend where they like on campus. It's great if you don't want to trudge back to the cafeteria for lunch, you can easily grab something on campus at the Cougareat or one of the cafés.
On-campus dining should be enjoyed while on Dining Plus freshman year, because you quickly realize later that without Dining Plus, eating on campus can get really expensive, really quickly. The food is pretty good-nothing spectacular, but nothing revolting. There are not a lot of low-fat options readily available, so beware of the Freshman 15. Everything is really convenient, and location is exceptional, so using the dining plan freshman year is highly recommended.