I use these on my Penny sized deck and they work great. They are the perfect size and give a surprisingly smooth ride for such a small setup. They go over most cracks easily and can handle bigger ones with a little help.
These wheels are great! I've got a Powell Golden Dragon Flying Dragon board, and the wheels that came with it (54mm, 99a) weren't too great for cruising around on campus. I swapped them with these, and they're awesome!