MacBook Pro 2015 15"

Has anyone seen any full, thorough reviews of the new MacBook Pro 15"?

I know the battery life and hard drive speed are supposed to be much improved.

Does anyone know if the new models have a "model-specific" version of OS X Yosemite which could cause problems if I restore from a Carbon Copy Cloner backup of my MacBook Pro mid-2012 15" model?

I am thinking of replacing my 2012 with the new model, but want to make sure I take any possible problems into consideration before pulling the trigger on the new system.

Thanks!