I had a really nice experience at Uotan. The room was as described, the wifi was decent and there were many spots to work. There’s also a great restaurant in the building in case you’re bogged down with work. The neighbourhood is also very safe, very mellow and is reasonably near to many of the tourist hotspots.
The only disappointment I had was that it was hard for me to meet people, being severely Spanish limited. A lot of the workers seemed to be locals and there weren’t that many remote workers. I’m not sure if that’s typical or just true or the days when I was there.