Perhaps sometimes some VSTs hide bad code behind good GUI. But another frequent case is that good code is hidden behind good GUI.
The only way to know is to try out, but yet again - in the world of VSTs there are things to try out. In the free world the amount of plugins
is very small and there are not a lot of things to try out in the first place.

I do not think I have a clear opinion on this. And I would be very interested for you, devs of audio software, to share your opinions. But lately,
after having been quite tired by fighting the limitations linux audio has today for making certain types of music, I've been wondering whether
some software is better off being proprietary. It might not be reviewed code, but it works. And I don't really want anyone to be able to change
code of, say, FL Studio, because it is a great piece of software already. I don't remember ever encountering a bug while working in it.

Of course, I personally switched to Linux because of philosophical principles. And now I find myself confused. Is it possible that some software
is too complex, needs too tight a development and thus good funding to be free? And instead needs to be proprietary to get things done?


--
Louigi Verona
http://www.louigiverona.ru/