NinjaSpinner

Very smooth bearing, but sometimes it slips out of the piece. I could try gluing it.

Just a little smaller than I thought it was. Besides that, it's great

For a good fit, make sure your index finger is around ring size 8! I have large hands and it does not fit well. This may not be a big deal for the majority of people, but as someone who has spent time with karambits, it is quite frustrating that I cannot do many tricks without the risk of the spinner coming off! Apart from this, the product is as advertised, it might be a bit pricey for what it is but It certainly is fun. My boyfriend also enjoys it.