Overall: I've stayed here before and I'll stay here again. It's cheap, comfortable, in a great location near my favorite coffee shops, and a quick walk to/from Zurich HB station.
Only negatives: The drainage in the bathroom isn't great, so after a shower the floor was wet for a while. The walls are a bit thin so sound in the hallways & other rooms travels a bit easily. Earplugs solved that, but something to be aware of if you're super sensitive to noise or a light sleeper.
Again, overall this place does the trick and I'll stay here again.