When I first got my I-Frame I played around with it for a few months and had a few people come up to be asking to try it, to the say it was great.
After playing about again with my I-Frame just before Campaign I got it just how I like it and had one french guy ask if he could try it and said that he was going to get one put on his Impy becaise of the trigger setup I had on mine, yet I'm still not too pleased with how I have my trigger, I can get a very fast rate of fire out of my marker, but theres always room for inprovement