They do look like a knock off of the Rev and they are not the only one. Have a look at ebay. There are a few interesting stunt kites that come out of China, would love to see a review of them. I still support the mainstream stuff (BTW I don't own a REV but it is definitely on the agenda) but the stranger stuff is interesting - eg the huge delta that is around for about $100. Would own it just for a laugh. How much are they asking for the Freilein? Probably good entry level then get REV when you are serious.