Yeah, I tried them last night for the lightest weight available and felt them in my knees as well, I can remember Zed saying similar.
What exercise do you do for quads instead?
I was also thinking there are no abs in there as well, I'll throw them in on back day.
As for the psnuami Psizzle, the wind is picking up, ha ha ha.
Rollergirl, you should start a log, in that way you can keep track of improvements plus others will stop in and give you advice and tips.