We did not have a good experience but I'll try to be fair and stick to the facts.
Carles is very professional, answers questions quick and provides you with specific information if needed.
The location of the apartment is great, it's in the middle of the Old Town. Although it's near to restaurants, bars etc. it would be a quiet place if not for the ongoing construction works.
The apartment is super clean but not as light-flooded as the pictures suggest and with no personal note (this is meant nonjudgmental). The water jet of the shower is pretty weak and we didn't have warm water the first evening (afterwards there was warm water). I guess the apartment is equiped with all you could need during a stay for a couple of days.
So far it was alright, although not quite what we expected in regard to the pictures (and maybe the price a little).
But: the mattrass was so so soft (!!) that after 3-4 hours I couldn't sleep anymore and my back hurt. My girlfriend could sleep although it was not comfortable for her either. Btw, I'm 70kg and not high-maintenance ;)
Of course, some (or even a lot?) people prefer soft mattrasses. Nevertheless I'm very surprised I haven't read about that very soft mattrass in the reviews (I did not read all of them).
Long story short: we left after two nights although we booked four but my sleep and my back were more important to me (and luckily to my girlfriend as well). Carles was still very professional but maybe a little less friendly and quick with answering (and somehow I do understand it although I was a little disappointed).