For me weight was and is the big thing. I also think my engines start easier and run smoother than ones I have done with a mag. Sure there are other things to deal with using electronic ignitions like batteries and sensors and another switch, but you can use those things to your advantage to balance a plane. I use CH ignitions in all mine. All use Syncrospark. I could run the standard ignition by them (no syncrospark) and save 30 or 40 dollars but if I ever had a box go bad I can swap anything out. Never had to yet and some are 2 years old. Also use Bosch caps on all mine as it eliminates a hose clamp on the plug for holding the ground wire.