We bought from Cinemartin and would never do so again.
We purchased (circa $600 USD) their ProRes plugin (Cinemartin Cinec PLIN) for Premiere Pro and After Effects. It did not work. We asked for a refund immediately but our request was refused.
We argued our case - Cinemartin stuck to their 'no refund' policy. We argued again given their software did not work but 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.