The Mizuno Wave Sky is Mizuno's most cushioned shoe that Mizuno makes, though it's not necessary plush. Mizuno tends to stick with firmer cushioning, which makes the Wave Sky a good trainer for short- to mid-distance, up-tempo training runs.
As with all Mizuno shoes, you'll also get legendary reliability, so if you prefer to buy quality over quantity, you'll get a lot of miles out of this speedy comfort shoe.