I had a fine time, but I was pretty lucky.
-I'm 6'. If you're taller than me, you'll likely have a worse time. Parts of the ceiling are 6'1", the beds feel even shorter than a normal twin, the showerhead is 5'9", and the toilet seat is tiny. The whole space seems built on a significantly shorter scale.
-Don't plan to sleep in after 5:45am (on a weekday at least) unless you're a very heavy sleeper, as people moving around upstairs (including kids and pets) start getting pretty loud around then and don't stop for hours. (This can often be fine if you're coming from the East Coast, though.) The fridge can also get pretty loud in its cooling cycle.
-The place had some other issues (weird tasting tap water, no cups larger than ~300mL, sketchy front door, etc.), that were mostly addressed pretty well (filter on tap, water bottles in fridge, solid keypad-locking inner door, etc.).