i owned a Mako Millennium for about 6 years.
it is very fast, probably the fastest surf ski of it's length. it is well made, no issues at all with durability. i thought it to be more stable on flat water than a cleaver x. my problem with this boat, and the reason i sold it, was that it was intensely rubbing my back after about 6 miles, to the point where it would take literally 3 weeks to heal. some people do not have this problem, but i am not the only one, a paddler in our club tried to modify the deep and steep cockpit in an attempt to save his back. you can try gluing some foam near the rear to push your rear forward.
+ very fast, durable surfski
- very uncomfortable and tippy for beginners or intermediates.