I like DW CC slightly more than than CS5.5, for what it is worth.
DW CS6 was not as stable as 5.5. I found it crashed a lot more, but with DW CC, they have fixed that problem.
The Negatives for me in DW CC are:
- The Server Behaviors have been deprecated. Adobe did add a deprecated server behaviors extensions to get them back, but in future versions, Adobe plans to remove them altogether which is part of the impetus for the MySQLi extension.
- The Subscription Model. I, personally, am not a fan of subscribing to software.
Aside from those 2 issues, my nod goes to DW CC, but only just barely.