Hi Mike
Wersi has been making instruments using the Microsoft OS for more then 7 years, and have been able to use VSTs for over 6 years, Lionstracs and Openlabs are newbie’s by comparison.
The first OAS instruments made are still in production, and so they can be updated to the latest version without trading in the board; this is why in the long term they work out cheaper.
Another point to note is that they are as easy to use as most Hardware Arrangers and Organs, whereas Openlabs and Lionstracs still require a fair amount of input and knowledge from the user.
Finally, Wersi have been making Organs and Keyboards since 1969 and so have a wealth of experience.
Enjoy whatever you play

Bill