Front seats are not particularly comfortable but not so different from most cars I've driven. I've already bought seat cushions. I've put long days on a bicycle I ride regularly which is more comfortable than anything between a vintage VW Beetle and a modern Buick with the exception of a Renault 16. In fact most car makers would do well to go out and find a 1972 Renault 16 and take very, very careful note of the seats.
But seat comfort was secondary to other considerations such as water-tightness of the convertible. Not a deal-breaker.
see full Ford Mustang review
What Our Members Are Saying about the Seat Room and Comfort of the 2011 Honda CR-Z
No rear seats in the US version, which greatly reduces passenger utility. However, the storage space is much bigger than many cars in the same price range. Driver and passenger seats are otherwise adequately comfortable.
see full Honda CR-Z review