Incredible location just steps off la Rambla, ten minute walk to the water and Plaza Catalunya, five minutes (or less via alleyways) to Mercado Boqueria, less than 3 mins to the L3 metro stop.
Dozens of restaurants and bars and pretty much every kind of shop/shopping you could want right out the door.
The apartment is in an older building (it's la Rambla, after all) but was very clean and everything worked well.
Bedroom was very basic but functional (it has a sink which was nice for brushing teeth and getting water in the night). The bed is just a twin and not the sturdiest (I wouldn't suggest it for couples unless they are both quite small) but was surprisingly comfy.
One full bath (good water pressure in the shower), one half bath. No issues there.
Full kitchen, though I only used the fridge to store beers and a few snacks. Nice little dining area (again, I did not use).
A nice couple have the bedroom across the hall (hi Will and Lary. Thanks again!) plus another guy down at the other end of the hall (saw him just a few times but that was it). I had no problems whatsoever with any of them, and in fact the couple (especially Will who speaks decent English) were quite helpful, especially with check in and when I locked myself out of my bedroom one night (I suggest you ask for the code for the keypad to your room when you check in to prevent a similar mishap. I did not...oops).
I never actually met Teo, but he was always quick to reply to my queries and was always helpful.
All in all I was extremely happy with my stay. Great "bang for your buck". I basically just slept there and spent most of the days (and a good part of most nights) out exploring this incredible city.
I would be very happy to stay there again.
I can't imagine a better location...