"Notchy" is relative, and everyone has a different take. I find the Dieselgeek action to be very positive, in that it does indeed have a solid thunk when it engages. Some folks might consider it notchy I suppose. The stock action felt like you were rowing the gear lever through some sort of viscous fluid with the approximate density of organic peanut butter. This feels, well, like a performance car manual transmission should, IMO.
It is adjustable, though the process is fairly labor intensive in that it involves adjusting several (up to eight) Allen screws and, usually, locking the gear shift lever in place with the include pin, all of which needs to be done with the air box out of the car so it's not quite a simple one and done. I had to adjust mine a few times to get it where I wanted it (or, in the first case, to even get the car in gear), but that's not unusual with this sort of thing.
I second the suggestion though that you first get a heavy short-throw shift knob from someone like Raceseng or BFI or whatever and try that first. The installation is easy, and it makes a big difference. I almost went with just the knob, but I had already ordered the Dieselgeek part so I put that in anyhow. Glad I did, but a better knob might just do the trick.
