if i didnt get a +4 i probably would have sold my blaster long ago, takes the "kid quad" feeling down a peg. its been worth every penny on the trails and really helped me last ride when we were crossing a creek after 4 days of rain and people were floating down stream. not me baby lol i rode that +4 and yfz450 rear shock like a pogo stick across and ended up having to shut it down on the other side and go drag some people out. its also helped me keep up to my buddies riding raptors and whatnot because i dont have to pussyfoot around the throttle the way i used to. with the stock swinger, my stance on the quad, and my size it seemed i had to baby the throttle or i'd have to pick myself off the ground. that feelings gone now and i can use all the power i paid for all the time not just sometimes.
if you skipped over most of that ramble just read this. get the +4 its one of the best things i've done to mine and will be one of the first things i do to any blaster or similar quad i buy in the future.