The hub motor does not brake. Even if it did put resistance on with a regen mode, it wouldn't be sufficient for stopping needs all the time. It should fairly well coast when there is no power applied, but the weight alone will drag it slower. If you mount it on the front forks, you can still use your coaster brakes. Just use two torque arms, with a steel fork!!!
Wow, for $100 plus 25 shipped, it sounds like an inexpensive way to test out e-bikes. Maybe I'll pick one up. I've heard Heinzmann are durable.