The staff was always very helpful and friendly, the 24h reception is a really great thing and they answer your questions with a lot of patience and understanding.
If you're leaving later than the time where the checkout is, you can just ask if you can store your things in the chill out room in the lockers whilst you're still doing something, that shouldn't be a problem!
Something I had misunderstood was the locker situation. There is a small "locker" in the room, but there is no lock on it. You would have to bring your own. But there are lockers in the chill out room where you can store your things safely for a small fee.
All in all I would probably book it again!
P.S.: Bring earplugs, in case you have one or multiple loud snorers in your room :)