Question

I'm willing to buy pianoteq5, however I don't know how to be sure before purchasing it that it will work with Studio One Artist v2.
I tried the trial version, it did not appear in Studio one.

Answer 1

The "Artist" version of Studio One does not support VST, AU, or VST3 plug-ins.  Therefore the pianoteq5 plug-in will not work with the "Artist" version.  Here is a comparison page that will show you what is included in each version of Studio One 3.  For version 2, you had to upgrade to the "Producer" version or "Professional" for 3rd-party plug-in support.  Now, there is an add-on for Studio One 3 Artist that will give you such support.

http://www.presonus.com/products/Studio-One/compare-versions