Just to be clear, there are two sellers available, but the kit isn't sold by Amazon.com (or fulfilled, either), so Amazon Prime is not an option. Including shipping, the kit will run you about $280, but the item really includes 3 kits, in case you get it wrong the first time. There is no anesthesia included, so you'll have to get that somewhere else.
It has a buyer rating of 4.5 out of 5. However, some have reported the instructions are not very clear. The fact that they insert 3 kits in the one item may be seen as a comfort, as you will have multiple tries. It is similar to the case with screen protectors, we assume, where it is almost a requirement that more than one attempt be made.
In reality, a look at the reviews show that all are tongue-in-cheek. That said, because of that we have no idea how the kit is really rated. Just remember, since it's not sold by Amazon Prime, you have to rely on Amazon's Marketplace policy for returns, which is not as liberal as its own. If you have an experience with the kit, please leave a review at Amazon.com, or in our own comments, below.