I recently stayed at Smartr Gran Vía 47 in Madrid, and overall, it was a good experience! The room had a private terrace which was really cool. And even with the hustle and bustle of gran vía right below, it was still really quiet in the room. Also the location is really central to shopping. Restaurants and nightlife which made it very convenient.
That said, there were a few minor drawbacks. The bathroom was on the smaller side, and the bathtub was quite tiny, which might not suit everyone. Additionally, it took a while for the hot water to heat up, but once it did, it was fine.
Despite these small issues, I thoroughly enjoyed my stay and would recommend Smartr Gran Vía 47 to anyone looking for a centrally located, comfortable place. I’d definitely stay here again!