this is the best 6x6 on the market. I got this cube when I was averaging 5 minutes and after practicing with this cube for about week I started averaging sub 4.
I would definitely recommend this cube to anyone trying to get into 6x6.

This cube made me significantly faster at 6x6 and more interested in the event overall. It's got a nice, smooth and somewhat sandy feel to it, and the magnets help so much. Lockups and pops happen occasionally as with almost any 6x6, but this is honestly something I've come to expect at this point (and these would probably go away with tightening or more accurate turning). I don't hesitate to say that this is the best 6x6 out of the box, and if you know what you're doing (which I don't), I feel that it could be set up to be almost perfect.

The X-Man Shadow M became my main 6x6 out of the box. With break in, the lockups/catches that many others have noticed went away for me. The puzzle turns smoothly and the magnets are not too strong. I recommend this cube if you are interested in upgrading your current 6x6 hardware and care about your 6x6 times/hardware.

The X-Man Shadow M is likely to be the best 6x6 on the market. I was expecting the cube to turn similar to the Wuhua V2 since it was the most recent 6x6 released by Qiyi and there shouldn't be a much step up in 6x6 hardware. I was definitely wrong. This cube turns possibly even better than the Wushuang. The cube is very smooth and fast. The magnets are on the weaker side, but with some set-up I believe that this won't be a big issue. I expect the Shadow M to replace a lot of people's current mains and new records be broken with it.

I got the stickerless one and love it! After 100 solves I've had a few lockups but only 1 pop! It's very easy to use and set up, the magnets are on the weaker side which I prefer.