This apartment is the same as the photos! It is very cute, well decorated and clean. We were two couples staying here and although I was worried about the "double bed" being too small for my husband and I, it was a great fit for both of us. The apartment overall had just enough room for the four of us, but I think any more people than that would seriously be pushing it. The space is extremely quiet and there is an elevator inside so you can bring luggage up.
My favorite part of the space is the location. It's in a quiet neighborhood that is easily walkable to all the tourist attractions without being in a crowded, noisy area. The neighborhood is very quiet and peaceful and you can see many locals walking around. There are three supermarkets nearby and the metro stop is only a 5 minute walk away. I loved the peace and tranquility of this space--it was close enough to the "action" in terms of tourist spots, but still far away enough to enjoy peaceful mornings. Plus, you're only a few minutes walk away from the Ciutadella park and Arc de Triomf (also stunning!)
Finally, check-in was great. We arrived early so we left luggage at the Sweet Inn office and they were very accommodating and nice. They personally brought us to the room and gave us tips on the best way to get around the city and the must-see sights. Can't recommend enough!