We bought from Cinemartin and would never do again.
We purchased (circa $600 USD) their ProRes plugin (Cinemartin Cinec PLIN) for Premiere Pro and After Effects. It did not work.
We contacted their support team and were told to re-install Windows and all our applications - an endeavor that we balked at given it would take us days. We have never had an application fail to work before.
We asked for a refund immediately but our request was refused.
We argued our case - the firm stuck to their 'no refund' policy. We argued again and they refused to listen.
We're stuck with an expensive plugin (circa $600 USD) that does not work. The experience of dealing with Cinemartin has been a huge headache and costly for us.