I live a few blocks away. Pretty much as safe as you'll get right in DC; highly walkable area in between two metro stops and buses in each direction pretty much right out front. I always see young people, bikes, etc. out front. There seems to be a good feel around the place and seems less touristy somehow than others nearby.

I've stayed there. You can get private rooms with bathroom that are pretty decent. A step above a hostel.
Very safe location, across from a Hilton or Marriott. 20 min walk from Dupont circle or take the bus. Lots of places to eat in Dupont circle. Nice cafe downstairs.
I'd stay again.

The DC one is in a great location - walkable to lots of things to do and restaurants/bars/coffee shops as well as a metro stop.

They are a chain of hostels/budget hotels in Europe. Yes, its aimed toward young travelers on a budget. I stayed in them in Berlin, Amsterdam, and London twenty years ago and there was always shenanigans going down.

DC version is in a good location.

Any feedback? Is it a decent location for young people staying to explore the city? Reasonably safe location?

It sounds like it is a a hostel type hotel.