It's nearly 50 years since I did any stump grinding on my own account, then it was a Myers-Sherman or Opico on the back of a tractor. I have used the Dosko 10 years ago when working and the Carlton 7015 and Vermeer  252 around the yard doing bits and pierces at my last job.   I helped @Dom and his merry men fell a largish cedar for my brother and elected to grind the stump myself. It was half on a bank, 52years old and 4ft through at the felling cut.   Having seen @Ty Korriga