Hey, I am most probably the worst person to comment on this topic but was asked by justsoulin to do so since I use Bitwig.
I unfortunately do no posses enough "DAW" knowledge to give comprehensive feedback on it and to compare it to other DAW's out there.
I just recently started playing with it as a request from a good friend of mine who wants to collaborate with me so we try to work on the same DAW's to make it easier to send projects to one another.
I have worked a bit with Pro Tools, Cubase, FL Studio, Ableton Live,Cool Edit, Audacity and now Bitwig.
Bitwig immediately gives you a "GUI Scrambled" feel of Ableton, there is no doubt about that. The GUI is very light weight and very responsive which I like. I also love the fact that the when a plugin crashes, your main project stays in tact and you simply can reload the VST and pick up where you left off.
The DAW is still in its early stages and they often release updates to patch bugs here and there. I work for a software company & I am used to the industry so this doesn't bother me too much. I'm a patient kind of guy:P
I also like the fact that they are catering for Windows, Mac as well as Linux. This expands the collaboration possibility even more so that's obviously a good thing.
Overall, I like it very much but I still believe that a person should use a variety of tools to get the best kind of sound/feel for different kinds of styles and music. I understand that this is not always possible for everyone recording at home due to the costs involved.
I will give more feedback on it as I work on it
Cheers