i got a refund for my sct through IDP considering i had it for 2 months and it never worked... The H&S tunes are pretty nice, really nice shifting, but i havent used them enough to really give a good idea. The KEM tunes are amazing. i ABSOLUTELY recommend them. i didn't run IDP but like two hours before i fried my PCM but the comparison between the Xstreet and the KEM 275, i prefer the 275. the shifting is firm, but nice. and it pulls harder than the xstreet IMO. i know i have a lot more traction issues with the 275 LOL and i think that is what mike has to compare to the xstreet. now the 310 shifts really hard but it a lot stronger. weird thing is the 345 pulls really hard, but shifts smoother than the 310 and has a earlier lockup.
Ill continue running KEM stuff, especially because mike really impressed me. I wont run the H&S stuff unless i gotta send my SD back to mike..