I've had such mixed experiences with MAC mascaras. I started with Fibre Rich way back in the day when they had all of the different colours (oh, to be young and rock the turquoise eyelashes again...). I also remember trying Pro Lash a long time ago and being sort of neutral about it. Zoom Lash is comically bad and probably one of the worst mascaras to ever grace my lashes.
I've been wanting to try Plushlash and X for a while, but maybe I'll hold out for this one. I don't know, I find big brushes don't give me enough definition, but maybe this will be a good everyday mascara for a more natural look.