I had a B&C lightweight push-button starter installed on my engine when the engine was overhauled. I have about 60 hours on it now and it works great. The starter cranks the engine with more velocity than the original starter, even with newly overhauled cylinders. In cold weather I used to always prime the engine by pulling it through by hand before starting it. Now my procedure for cold starts is three pumps with the primer, then one quick bump on the push-button with the mags off. Then with mags on the engine starts almost as soon as I hit the button again.
The only negative I can think of is the B&C starter needs to be installed when the engine is out of the airplane. The shaft that the starter engages must be shortened. That precludes the original starter ever being reinstalled on the engine.
