I haven’t been that long a user of Cubase, started on 5 and now on 6.5, but would just like to add my voice to those critical of the UI.
Seems to me that Steinberg have taken a seriously wrong turn with 7.
Aside from any bugs that 7 may suffer (by and large they get fixed eventually), the UI is just plain horrible. It looks cheap and not at all business-like and ergonomic.
Unfortunately, IME it is unlikely that Steinberg will change it as developers rarely admit that they got it wrong.
Absolutely sticking with 6.5 for the foreseeable!