I have been struggling with WL7 since it came out. We are still using WL6 for all our mastering work with clients. WL7 is still in its "proof" phase and we only use it when there are no clients around. I have used WL since version 1.6 and have always felt it was very easy to use and produced superior results but with this version it feels clunky and a PITA to use. We also had some distortion issues early on which turned out to be some settings in the buffers (????) and it crashed a lot until we put in version 7.01.
We recently purchased an Upgrade to WL7 for our video editing suite. It is the Mac version and I have to say that the GUI looks weird compared to most Mac software and it looks like you are running WL on a PC on a Mac.
Philippe Goutier, the author of WL, is one of the best people around when it comes to authoring DAW software and is available on the WL forums to answer questions. I think in this case he was either too concerned with making the program compatible with MAC or he just took it in the wrong direction for ???? reasons.
Anyway I am still a loyal WL user but until I feel very comfortable with WL7 we will continue to use WL6.
There is NO GOOD DOCUMENTATION with WL7, it does not come with a printed manual and what documentation there is sucks! Now I understand that for $45 you can get a DVD that explains how it works - the DVD is not from Steinberg but even so Steinberg really dropped the ball.
FWIW and YMMV