How much time does it really save? I've never used a Rotatrim before.
For me it's a huge timesaver, and more importantly it gives me more accurate cuts.
Prior to getting the rotatrim I had to take out my 60" matcutter, add the leaf in my dining room table, attach the squaring arm, and then I could start cutting things down to size. When I was finished I had to put it all way. Total setup and takedown time was easily 10 minutes every time I needed to trim prints.
Time is not really why I got it though. Accuracy is. I can shave less than 1/8" off the edge of a piece of paper with the rotatrim. I couldn't do that with my mat cutter. The blades on the rotatrim are self-sharpening. The ones on my mat cutter aren't. The rotatrim has a very well designed production stop that the paper can't slide under. My mat cutter has a production stop too, but the gap between it and the squaring arm is large enough that the paper slides underneath.
All in all it was a fantastically great purchase.
Neil