Good. The classic controls are far superior IMO when using quickly and trying not to look at it. This is the reason I will not purchase an iPod touch for use in the car.
I've used iOS since June 2007 and it had never even got close to the perfection of the click wheel. When I go on any trip of more than 100 miles, I always take my 60 GB 5th Gen iPod. For me, part of it is space - but it's mostly for I/O.