Used this thing in a woodsball match yesterday, and it worked awesome! One thing to keep in mind is that these things HATE standard 9v batteries. Had to buy a 9.6v kingman battery. Just like the kingman e-triggers, this thing will not release the striker if it's not getting the proper voltage. I was able to get it to work for around 200 shots with a brand new Duracell, but ultimately, it died quickly and did not work as well as the fully charged 9.6v. You might not necessarily need a kingman brand battery, but at the very least, a strong name-brand 9.6 MUST be used in these triggers.
On a side note... I really like the shutter too! This things badass. I played a round yesterday with this, and it's great! Nice and reliable. I did some free mods, removed the venturi, drilled out the va and modded the valve, as well as swapping on the mr1 trigger. Also bought a cheap jcs 8" barrel. This thing is a great backup!