Yea RAID-0 does make the drives a little faster, but you lose reliability. In RAID-0, each drive is theoretically twice as likely to fail. I had to reinstall somebody's 3-year old Dell XPS machine because one of the drives in their RAID-0 array was failing after just 3 years. Had to install a new hard drive and put Windows on that in the end.
Not saying RAID-0 is bad, you just need to be aware of the disadvantages as well as the benefits.