Maybe for purly drag race use its good but i frequently find the Z auto in the wrong gear when i punch it around time and the delay before it downshifts is annoying, not to mention the soggy upshift. Lets face it, the z auto is now old school tech and compared to the newer autos its too slow to shift in stop and go traffic. Maybe a built auto is nice but if you look at the cost involved i prefer the 5 sp.
Don't get me wrong - there are many autos out there that make me not miss a 5 speed but the z auto is not one of them