Product review (5 stars): Best thing since sliced bread....
The first thing I have to say is that if you've ever ridden a Snakeboard, then it won't take you very long to get the hang of these, the foot/body movement is really close.
I think the best thing about these skates is that (believe it or not) you can balance yourself better since your front foot won't dictate what happens to your back foot, like on a skate/snakeboard...  You just need plenty of patience in learning how to Freeline, and the payoff is WELL worth it.

To the above posts: for uphill skating, you REALLY have to throw your upper body into the footwork to get some good momentum...

For the clear wheels and other cool add-ons, go here:
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Also, I really recommend wearing at least elbow pads and wrist guards with these... ;-)