Interhostel

Surprisingly clean hostel (well, as clean as a hostel can be) in a great location, close to bars, restaurants, supermarket, and attractions. Very affordable with rooms starting at 149 SEK (or $ 20 USD at time I stayed). I originally booked a 14 Bed Mixed Dorm room, but when I checked-​in, I got upgraded to a 6-​bed female room. Score!
Of note, they do require a 100 SEK room deposit which you get back when you check out. Also you have to pay extra to rent linens and a towel. It wasn’t a big deal to me since I brought my own quick-​dry towel and travelsheets. I read up beforehand that it’s not uncommon for European hostels to charge for linens (unlike US & Canadian hostels). Thus I packed a sleeping bag liner/​travelsheets so I didn’t have to pay extra.
Another perk of this hostel is there seems to be plenty of washrooms and sinks. I never had to wait to use one. Also plenty of showers, albeit at the cost of privacy. No private showers, think open shower area with curtains separating each «stall.» And an area similar to a sauna where you can get dressed after you shower. Lots of common areas to hang out with your laptop. Kitchen was busy during dinner time as everyone seemed to prefer cooking in pricey Stockholm!
Overall, enjoyed my stay here. Wouldn’t mind staying here again next time I’m in Stockholm!

As far as hostels go in Europe, I think this one was pretty ok, probably above average. Very important to me, the place was fairly new and very cleaned with large bathroom and showers. Internet wifi is free but really sucks, they should really improve that. The location is also perfect that you can walk to all sights, bars or restaurants. It was priced in the same range as all other hostels and definitely cheaper than a regular hotel. If you have to stay in a hostel in STO, I would say easily this is a great option.