I am assuming you mean the 'CrossClimate' tyre?
Couple of reviews here, but no final conclusions yet.
http://www.tyrereviews.co.uk/Article/Michelin-CrossClimate-First-Review.htm
http://www.tyrereviews.co.uk/Article/Michelin-CrossClimate-launched-is-this-a-game-changer.htm
I think from what I've read, the tyre is the next evolution up from 'all season tyres' but they have only been on the market since Spring 2015 and therefore long term 'real life' benefits have yet to be confirmed.
I think 'all season tyres' are a bit of a compromise, neither better than 'summer' tyres in winter or better than 'winter' tyres in summer, with only a narrow margin that they prove superior.
CrossClimate tyres are not all season tyres but whether they prove a better all rounder remains to be seen.
If your driving 90% of your time on roads above an ambient temperature of 7C then your current purchase would be the best choice as long as you are aware the other 10% driving must be a bit more circumspect. ☺☺☺