I've been highly interested in the resource since their X1 (for XF 1.x) and after having see many friends purchase this I decided to do so myself. Without a doubt one of the best purchases I've ever made, the price got me a little worried being higher than expected - but I didn't doubt purchasing afterwards.
This addon is easy to use, straight forward and really makes it easy to setup. A highly extra feature is that this allows you to disregard captchas by having players register from in-game - thus being less of a nuisance for your players.
It's a great cosmetic 'donator-perk' to have their rank show while they post. The team have always been very friendly and have answered my questions without any issues.
Overall amazing purchase, haven't regretted purchasing and certainly amazing to use. 10/10
While Minecraft server owners should take care to read XF instructions on groups and permissions, MineSync really is an excellent solution for handling Minecraft to Forum integration in a way that will save you time and let you focus on improving your Minecraft server. The support is also top-notch -- quick, intuitive, and possesses a seemingly limitless patience. If you can swing the price, it's definitely worth it.
Great support by the developer when I found a bug with our setup. Really good XenForo to Minecraft linking plugin. Works really well and efficiently (eventually!) - Definitely worth the money, my community (softuf.com) loves it!