Looks good. Probably a better design would be to have that grip-like shape on both of the inner sides, so I could use both of the outer sides for sparks, then I could use the product for a longer period. But I guess this will be in my bag for decades anyways :) Yes, it doesn't come with a flint, but you don't need flint for this - the sparks are coming from that steel piece itself. All you need to do is find a harder stone than this, it doesn't matter what kind of stone that is.
Throws a decent spark. Would highly recommend this seller.