For starters: great communication. Super easy check in/check out. Location is great (see better explanation below): close to most everything (train, Reina Sofia, LavaPies, el Rastro), but not in it. For those that want more peace and quiet, this is great. For those that want to be in it, this would be a bit of a downer. We loved it: very non-touristy, but right across the boulevard from all the wonderful hustle and bustle.
The biggest issue to consider is space. This was small even for two people, especially in the heat of summer and not being able to really use the deck except at night. Very tight quarters. That said, the price is right and we ultimately enjoyed our stay. We wish we could have stayed longer.