I would recommend renovating the bathrooms a bit, and installing better and more secure lockers for valuables. There are two mattresses in the bunk bed room on the second floor that are terrible and need to be replaced! They're like rocks.
I loved that they included towels and breakfast as well as 24/7 complimentary drinks such as hot chocolate, coffee, juice and water. They have plenty of chill rooms with entertainment like books, movies and a pool table. The showers are nice and warm, and I like that they have doors with locks for each shower, and inside there are hooks for your clothing and a shower curtain so your stuff doesn't get wet. The staff was extremely helpful with any information that you ask for.
You can only BUY towels for 4,50. You can't even rent them. A lot people don't have room to carry a towel with them, so they might have to be thrown away after bought for that ridiculous price, and used only once, maybe twice. The lockers didn't have a lock, so you had to buy one for 5 euro. The breakfast was pretty decent, though.