The new user interface is extremely cumbersome to use, and makes even the most basic tasks very difficult and time consuming.
Furthermore the filtering edit box is located at insane location and very far from the Working Copy window, and other windows that it affects.
The versions up to 1.5 ware extremely well designed overall, with obviously a lot of thought put in them. The 1.6 is exactly the opposite, and I have not been able to use them at all.
I am still using the 1.5.2 and will not upgrade unless there is a major UI redesign in the 1.6 version.