Location is perfect. Close to everything you need. And close to Placa Catalunya which is a connection point with transport to the airport, metro and buses in the city.
The apartment is well thought of. All the amenities you need are there. My girlfriend was very happy to find high-quality hair-drier and iron available to use. All the bathroom accessories for taking a shower are also there, which is important and intelligent to have available.
Check-in nice and easy. Elevator works nice.
I must however make a comment on the noise that comes from La Rambla street. I was prepared that it would be noisy but hoped it would be less. And I wouldn't be making a big comment about it if there was no room for improvement available. The host should make an effort in future to improve the sound-proof quality of the windows. The window consists of only 1 glass 'sheet', not 2 (or if you want to go to an even higher quality 3). Which therefore lets a lot of the noise from the street (people and a lot of garbage trucks) to come through. If you are a light sleeper and this is important to you be aware. If you are a sound sleeper (like my girlfriend) you won't be troubled.
Other than that everything was 10/10.