Thanks to a fantastic corporate rate, I stayed here on business. Overall, I enjoyed my stay -- the hotel has a fascinating history, and its been restored with that history in mind. If you like that kind of hotel, you'll like the Biltmore.
Service during the stay was excellent. The valet was welcoming. Questions were answered by all staff happily. As a colleague and I searched for a place to dine, a restaurant server in a bar gladly allowed us to use the menu from the casual bar in an otherwise-unoccupied outdoor space and, to his credit, didn't leave us to languish outside -- he was very attentive. Service at breakfast was speedy and friendly. The only service glitch was at check-in, where the staff member seemed to be in training and thus very unsure of herself and the hotel's policies -- she was, though, very nice and did see to it that my questions were answered even as she had to double-check a couple of the answers. I accidentally left a laptop charger at the hotel, and when I returned later in the day to retrieve it, everyone was very helpful (and it was found). So, overall, the service was impressive!
I get the sense that the rooms are variable in size, etc., as they often are at historic properties like these. I have no complaints about my room, however -- it was very large, with a small sitting area and a larger bedroom. The bathroom was elegant with very nice products. The bed was soft with nice linens. A couple of the room elements were rough-around-the-edges -- peeling paint on the window, broken handles on the window, a torn window shade -- but everything was clean. The desk area was a bit awkward, and there were not many plugs, but that's not unexpected in an historic property. The hotel was VERY quiet.
The hotel's grounds are very nice. The pool is very large, although it wasn't quite as elegant as I anticipated it might be based on the descriptions. The fitness center is large, although it closes in the evening (I prefer 24-hour fitness centers). It is also an athletic club used by members of the community, so it's busy with clients, trainers, etc.
The only part of the hotel I didn't love were the dining options. There were multiple restaurants, but my colleagues and I did not want a fancy, expensive dinner. We were referred to the golf course's restaurant by a few staff members, but found it depressing -- complete lack of atmosphere. We finally settled on a bar that had a lighter menu and, thanks to the above-mentioned staff member, were able to sit outside instead of the bar itself (thankfully, as its decor was that of an olde-world smoking lounge). The food was pretty average. The hotel redeemed itself with breakfast, however -- the buffet had fantastic options and was displayed beautifully.
Overall, this was a very nice stay. I think the thing Miami visitors should keep in mind is that this hotel doesn't offer what many might expect to the be the "typical" Miami experience -- while lovely, the hotel does not have the full-of-life, multicultural, beach-focused vibe that many other hotels in Miami (especially those along South Beach) cultivate. Its vibe (and neighborhood, and clientele) are much more the country-club set. That was fine for a quick business trip, but if I were going for the quintessential Miami weekend, I'd look elsewhere.