Zeust the Unoobian
Google
Only just arrived here but seriously this place... Go here. Do it. Now.
Edit: now that I've stayed here for 3 nights and moved on to a new city (and consequentially a new hostel, which is a disappointment in comparison), let me try to explain the magic of this place. It's really just collectivity. And it's in everything. All common areas are laid out in a way that encourages people to hang out as one big group rather than forming subgroups. And it works. Walk up to the hostel and you'll be greeted by guests sitting outside in front, and you'll quickly be invited to join them. You haven't even checked in yet and you've already spoken a bunch of awesome people, just like that. Magic.
Of course it helps that the staff is really chill and creates a loose atmosphere. Practicality goes over rules, like when someone has their stuff on what's supposed to be your bed, you just use the one that's free instead. It all goes so natural. And the staff hangs out with the guests too, sometimes you can't tell who's who unless you know them.
And of course the usual stuff (hygiene, facilities etc.) is well in order, the beds are pretty good, no complaints. I didn't notice anything from the noise of surrounding clubs either, but maybe that's just because they'd mostly stopped by the time I went to bed (which isn't *that* late, like between 12 and 3, but my stay was Tuesday-Friday so not the loudest nights probably).
TL;DR: This place is amazing, I stand by my original review. Collectivity is what makes this place magic.