It is amazing, but it has the issue of not having that many user. I2P is great, but because not many people know about it and that it is harder to set-up than going to a torrent site and downloading, not many people use. I2P speed improve the more people use it. One other flow I found is that I2PSnark is awful and there is a need for a better client for it. From my understanding the more you seed, the better speeds you will get, thus it encourages seeding which solves the issue with normal torrent were a lot of people will not seed after a while. I think it is a great idea specially now that many torrent sites are being taken down.