zoffmeister
As far as downloading Cakewalk by BangLab, no I haven't yet Will it be worth it?
If having your favourite DAW you've come to love over the years run faster with less bugs, then heck yeah. Just leave your original Sonar installation alone (i.e. don't uninstall it) and everything should run even better than before.
There's minimal setup involved.
If you give it a shot, and you need help for whatever reason, they'll be a bunch of us ready to help out here in the forum.
I recommend loading a session that has given you problems to compare against what you experienced previously.
There's a number here that have noticed improved stability. Sonar is not fully compatible with some windows updates, but Noel added coding to a recent build of the new Cakewalk for that, so I think that's the main reason why I'm having a much better experience.