We had a nice staying at Evlo's. The place is well located, a perfect spot to spend few days in Barcelona. There is La Fritas and Bar do Rodrigo just downstairs which are two amazing places to eat. Regarding the noise we see people talking on other reviews, it is noise as everyone described, but you are in the heart of the Gothic Quarter, if you don't want noise, you will have to get somewhere far away and take the subway (which I did not find any good in Barcelona) - I slept well because the noise did not bother me, but my wife didn't, it comes down on how easy you sleep and how far away you want to be from the centre.
The apartment is comfortable and Evlo's made sure we felt at home however I was working on the road and the desk was a low desk and a low chair, so it was not comfortable to work. If you are rent for long stay and need to work, I would advise you to talk to Evlo to get a better working desk and chair, but as I stayed for 4 days only, I can't complain.
Ah, the balcony, how can someone complain about that? The balcony was perfect for the morning and afternoon, driving a coffee and felling Barcelona after a full day. The place can definitely improve, but it was a great experience.