If you've traveled to Miami at all you know that there is quite a variety in regards to the types of experiences you can have. What I can say about the Conrad, it's location, the staff, and rooms is that it's an example of what can be great about Miami. The location to me was fantastic - not in the midst of the bustle of South Beach, but close enough to everything to be workable. The hotel is easy to get in and out of, surrounded by other fantastic and high-end properties and upscale restaurants.
The room was decently well appointed and spacious with a nice view of Biscayne Bay. The furnishings and decorative appointments of the room were neither spectacularly good nor noticeably bad. At the end of the day you're paying for a room in a name-brand hotel in a great location with a pretty view more so than you're paying for luxurious opulence. The bed was incredibly soft - if you like that sort of thing you'll have an absolutely blissful night of sleep (as I did).
Overall its a very nice hotel but not necessarily a hotel that inspires any sort of particular emotional attachment. From the hotel you'll gain a wonderful view and experience in Miami and that is where positive thoughts are centered - the hotel providing a means, but not acting as an end unto itself.