They're fast unreliable monsters that's for surePretty sure the 2nd gen has less favorable gearing than the 1G though.
Also, I've had mixed results running speed 3s. I gradually pulled a 2G I presume was stock from about 70-120, when I was S2+, and lost pretty conclusively in a couple 40/50ish rolls to a tuned 2G when I was newly K04'd.