I’ve used PDS for a couple of years, having researched their standards and workflow. In the last month an urgent project came in for a large multi-national tech client that involved 500 scans of a variety of film formats shot over the last 50 years.
They needed to be perfectly calibrated so that we could make exacting analyses, and in less than a month. This was above and beyond the call of duty, but PDS met the deadline with their customary efficiency and dedication. Very impressive.