This was my second stay and Manuel's, and it was just as good as the first, if not better. The water heater problem has been resolved for the most part, and he continues to be a great host in all respects.
Summary:
wifi: 5* never had any issues
shower: 4* (sometimes the hot water is finicky and you have to turn off/on the faucet, but it's a minor problem)
bedroom: 5* - very comfortable, nice comfortable sheets, blackout blinds
living room: 5**, projector is great, work desk could be a bit lower / chair a bit higher but it's a minor quibble
noise: nothing to speak of, quiet neighborhood for the most part, except for the garbage man ringing the bell at 7am (not the apartment bell btw)
Manuel even gave me tips for my next trip, he's just an all around great guy. Super responsive and helpful.
I would stay there again in a heartbeat.