I tried the Mako 140 yesterday. It was blowing around fifteen to twenty knots and well powered on my 12 m Lithium.

My first impression was how smooooooth the board is. It rolls over onshore chop with ease. If you have knee issues the Mako is a must have. I also like it's loose feel and playfulness in ocean rollers. It's surfy feel is somewhere between a regular twin tip and a surfboard, with a definitive lean toward a twin tip. In the gusts, the edge held like it was glued to the water without feeling locked in. It still has loose nature to it and it was all about control. I imagine this could be a one board take all, ridable right through nuking conditions.
It's a slightly different feel from what I'm used to, and this is the thing - getting familiar with it. I didn't care for it's upwind performance, or lack there of. After the session, I discussed this with my Mako friend. He told me it was necessary to adjust your riding technique to get the board to perform upwind. Instead of pressuring the tail, like on a regular twin tip, apply the weight evenly over both the front and back foot. This uses more of the waterline length to edge the board upwind. I'll want to try this the next time I'm out.
After riding the Mako, I switched off to my Shinn Dundee 133 x 42. My immediate impression was the feeling of coming home again. Again, it's a familiarity thing. The Dundee rocketed upwind and felt lively. While the Mako is crazy smooth, the Shinn is no slouch and easy on the knees as well. The Mako is so plush, it feels almost sedate. This isn't a bad thing, it's just that I'm used to a little more "alive" feel. The Shinn isn't what I'd call a loose board (could be a function of those relatively big freeride fins) and I like the looser Mako experience. In the gusts I needed to slow down to hold the bigger Dundee or would loose an edge. The Mako can go and go with my eyes closed...Was that a gust, what gust?
So like most gear, it's a compromise. I'd like to spend more time on the Mako but I wouldn't give up the Dundee for it. It all depends on what your preferences are, or moods. The Mako seems to have a niche of its own. I'd be happy to add it to my growing collection of toys.