Sorry to disappoint you, but well ... I'd call the Endurapro's trackpoint more of a gimmick than anything else. Yes, it does work and yes, it is quite useful when you're typing and just want to click that button. But I wouldn't ever use it for regular mousing tasks. It's horribly, painfully slow. You have to press really hard to make it move faster, which should kill your arm in no time. The buttons are quite hard to press, but I think that's more of an advantage, so at least they aren't activated by accident.
The Endurapro's trackpoint is in no way comparable to a Thinkpad's. Whoever makes that comparison has clearly never used a Thinkpad's trackpoint more than "oh! See how it moves when I press it!"--I can use the Thinkpad's trackpoint as my exclusive pointing device for weeks on end, which does not pose a problem at all--it's precise, it's light and it's fast. The Endurapro's trackpoint is precise, but it's certainly not light and it's horribly slow. It takes about 17 seconds for the pointer to traverse both of my screens (default pointer speed) when the Endurapro's stick is pressed normally (it's faster when pressing it hard, but this is so uncomfortable I wouldn't recommend it for prolonged periods of time), giving about 200 pixels/second--that's okay for pressing buttons near your current position, but totally unsuitable for anything else. It might have worked well with 640*480 screen resolution, but it doesn't anymore.
Still, the Endurapro is a great keyboard. Is the trackpoint worth the extra $30? I don't think so. It's a nice gimmick to have and you will certainly use it, but it's not as great as it sounds.
-huha