The salad bar is fantastic, and you get to fill an enormous plate for only 6,75. There is also a smaller plate for 5,50. It's usually very variated, with suitable options for vegetarians, vegans and gluten intolerants (IDK for coeliacs). I'm also not too sure about alergens though, better ask.
Food is tasty in general, you'll be able to find food from different countries such as couscous, asian noodles, etc. There are also other options which I still haven't tried (burgers, pizza, and hot food in general), but look quite good. Staff is generally very friendly (there are some grumpy people but the rest are wonderful).
I would reccomend it if you are studying/working at the Uni and don't have much time to prepare your lunch. You'll fill your stomachs for a reasonable price.