Great low speed motor, especially for the price. I've been using a 9x4.7 slow fly prop with a 3s batter and 20a esc, and the motor has never even been warm. provides enough thrust to hover most of my "swappable series" scratchbuilt airplanes. Seems very durable too...many, many flights on it, a couple of nose first crashes, and I've not had one problem with it.
One concern...the motor attaches to it's mount using a small set screw. Make sure to locktite that in place, or it will work loose. I have not had a problem with mine yet, but I know plenty of people have. A little red loctite, and don't give it a second thought.