It's an excellent transmission. The shift time is so fast that the shifts are just as seamless as any other automatic when driven smooth but you can really feel them when pushing. And then there's no torque converter so when you step on it on the free way, it downshifts, the engine revs up, and unlike most other automatics, it actually accelerates faster. The only caution I'd give is that it'll spoil you. All the other boxes I've experienced (which have been few) have come off as hopelessly vague and mushy.
It's a great way to feel in control of the car when you want it because of the manual aspects while still being able to relax and not think about shifting when you don't want. The only thing it doesn't have (which I'm still looking to experience) is the feeling of changing the gears yourself.
You can get cars with clutches as weak as pushing down a helium balloon, plus I'd rather move my left leg while driving rather than sit it there uncomfortably.
