I have an older MK370 equivalent. It is over 20 years old. We have used it on about a dozen homeowner type jobs. Certainly not a pro model but plenty accurate and stout for the homeowner. Quality tool, and I think they are still made right down here in Long Beach, CA. Customer service is excellent. Only things we've needed were a new set of brushes and I lost the wrench for changing blades.
Could be my imagination but the diamond blades are much cheaper today than they were 20 years ago.
It will pay for itself in one job.