Product review (5 stars): over a 1000 hours of fun so far!
I bought my freeline skates 3 years ago.  I saw my friend using them and I went straight home and ordered them.  Everyone says they are hardish to learn, and I think thats totally true.  I have taught well over 20 people how to freeline and I always compare it to learning how to ride a bike.  We all have learned how to ride a bike and it takes some time.  But with someone teaching you I have seen some of my friends get it in less then 3 hours to the point where they can propel themselves up hills.  BUT!  on average the people I have taught usually take 6 hours.  (Less time then it took me to learn how to ride a bike!)  I always remark on how great my friends are doing when I teach them and I am very encouraging and optimistic.
  A trick that I figured out to help people learn after they have spent a couple hours on the skates is for me to ride my bike and for my friends to be holding onto my side and going along side me on the freeline skates.  Then they can slowly start to practice the foot turning motion/movement that will eventually allow them to propel themselves forward,  I tell them "point your toes toward eachother, point your toes away from eachother, and repeat.
  Currently I have 3 pairs of freeline skates, 2 OG and one other pair who's wheels have lights and flash at night.  I only recommend these two and I have seen other types which frankly, suck.
  I have gone everywhere on my skates!  I went to China and traveled around daily with them.  I even went on the Great Wall of China with them! You can invent so many new sports with them including Freeline Street Hocky, Freeline street Soccer, Tag, anything!  I have a group of friends now who all freeline and we have so much fun doing it together.
  My favorite part of freeline skates is being stopped by people I am skating by who are completely mind blown and want to know "what the heck those things under my feet are!"  And then I eventually get them and their kids trying them out, having tons of fun, and even inspiring them to get their own.  Maybe these will be the next rip-stick and be super popular, who knows?  All I can say, is I LOVE freeline skating.