The Emerald Mansion is a good hotel and I would stay here again when the opportunity presents.
Things to note. This is a boutique type of hotel. Meaning it's on the smaller side and I don't believe that it would be suitable for families with kids especially, little ones.
That said, the room was well appointed, very clean and that emerald theme is engaging. Internet connectivity was good throughout.
The standouts to me are the staff. Whether morning or evening shift, they were consummate professionals. Quick to offer assistance above and beyond, exceedingly cordial and as I shared, very professional.
The neighborhood is an absolute gem for the traveler a little more interest in DIY tourism (though the hotel arranged for me to have an exceptional guide). By this I mean, you're stone's throw from amazing historical landmarks. The area was safe and felt that way to me. Good eateries all around, shopping abounds and navigation was not too complicated.
Areas for improvement. The AC situation was interesting. My visit was in mid March. Still cold/colder so the AC system was only set to heat. If you like colder rooms to sleep, this can complicate things. Fortunately, I was on an upper floor so I was able to crack the window open at night which worked.
The walls are rather thin so if you're a light sleeper like me, the city can keep you company quite a ways through the night. If you're on vacation, that shouldn't be an issue. Overall great spot. I recommend it.