The location is prime and there are lots of things to do around Ikebukuro. The closest exit listed is Ikebukuro Station Exit C1, but please note that there isn't an elevator at that exit. If you are carrying luggage, I'd advise you to look for another closer exit with an elevator. There are no elevators in the hostel as well, so you will have to carry your luggage up the stairs.
Now, about the service and attitude... Overall it was okay, but there is a particular male Chinese staff who is rude and discourteous. When he replied to my questions, I always sensed reluctance from him. On the first day, I was unsure about the latest check-in time so I simply asked him. And he replied in a way that felt like he thought that I was ignorant and was asking a foolish question.
The toilets and room are clean thanks to the ladies who clean up daily. The best thing about the stay was the location.