Went to Conservatorium for cocktails on my recent stay, all the bigger suites not fully running a month ago. Saw some of the top suites, and quite small, felt very crammed and narrow. Intresting design wise, but I would certainly hesitate staying as it is so new and the rooms weren't that impressive. Nice, yes. The casual restaurant and the lobby area were very nice, a huge light atrium.
Stayed at the Dylan and found it nice. Nice suite overlooking the canal, very light and airy. Almost like an apartment feel. Only downside was that it was noisy from the street/canal noise.
The Grand looks interesting, but haven't had a chance to check it out...