I'm not familiar with the durst, but I have used others - melico, perhaps a durst a while ago, and now a lici colorstar. The prior ones used to require adjustment of aperture or one filter at a time, and they were nothing but a pain. The colorstar reads all colurs at once, and has an integrated timer that means you do not need to screw with the aperture (usually) once you have started to zero in a filter pack to the neg in question. Durst did have some fine pro analysers, but thier prodc=uction list showed this as an amateur unit.
On an aside - I have figured out that this was made in 1985. Depending on the quality of the electrolytic capacitors, they may be getting to where they are dried out and no longer reliable. I have replaced caps in an '81 stereo reciver, and a number of late 70's Vivitar timers in my darkroom. Not really a lot ids knowledge required if you have an electronic tinkerer background.