I own a pair of F2's Intec Challenge Comp from 2002. It's exactly the same model you are looking for, only graphics have been modified. I do have some other F2s as well. No probs so far, I think the Challenge Comp is a fairly reliable, not too stiff binding (I weigh 74 kg - ca. 165 lbs).
The small cog wheels on the front bail need some attention, though. They tend to slacken after a couple of riding days, so check them every now and then.
Angles I ride are 60f, 55r. With that setting the default canting of 5° they come with makes no sense. I rather have both bindings flat on the board so the spare parts the bindings came with to set both to 0° come in handy.
Hope it helps.
fluke