The startup procedure for the VariOS was a bit of a process. Once running the sound quality was really good, easy to edit visually and store sounds. I had no complaints. But I wouldn't have wanted to use it live. If there was a power failure or spike and I had to reboot on stage it might have taken a little too long for me.
The Arturia VST Jupiter 8V was a great alternative. Sound quality is about the same as the VariOS and unless you actually own a Jupiter 8 I doubt people could tell the difference. A&B a real one with the software and obviously you can hear it, but a crowd of people, in a club, drinking, who aren't musicians, let alone keyboard players who love vintage analog gear....no one knows what you are using.
The update Jupiter 8V2 is a lot more stable and I use it live without any issues from my MAC.
Studio I would use either, live I will only use the Arturia.
And now to get to work re-making a bunch of sounds for Duran songs.