I use my emag whenever I can. I love it and it gets lots of looks on the field. Its always nice to have something different than everyone else, and it works so well.
I never have had issues with my level 10 since I installed it in both of my mags when it was a beta test. They give me a nice edge on the field, not having to worry about balls getting chopped. I could use any hopper I wanted and tilt my gun at any angle without problems.
The switch/shooting mode issue has been around since electros were in use. The mechanical switch noise is where the extra "trigger pulls" come from. There's always bounce in a mechanical switch. Many of the older guns used a reduction of debounce settings after a few shots so that extra trigger pulls were sensed due to mechanical bounce even when the extra trigger pull really didn't exist. This led to guns that fired much faster than you could physically pull the trigger. Many aftermarket board manufacturers actually made a living exploiting this. Ramping guns being allowed in tournaments actually made it easier to police, since now everyone could use a controlled extra shot feature legally.
Except for the Automag in front, its usually the man behind the equipment that counts.