As a program, I don't like Cubase....not because it sucks, but because it comes from a very different mindset than I do. I just find it awkward to use, with a very strange UI. Given it's origins are German, and I'm in the US, this could be part of it.
I use and like Sonar a lot; Reaper is the best app for the money I've ever seen; ProTools is industry standard (though I don't care for it either). I find all 3 of these easier to use than Cubase.
Steinberg, on the other hand, do suck. Very bad about issuing updates, even ones that have been promised in public. Draconian dongle copy protection scheme / replacement policy (pretty much, lose it, break it: buy it again). Now that Yamaha own Steinberg things may get better, but Japanese ownership of a German company releasing english language product sounds dicey. And as much as I enjoy the company of Germans and Japanese, neither country's corporate culture has a great history of responding to customer feedback.