I used to love it, back when Thinkpads still had real buttons to go with it. Then they replaced them with trackpad clicking, which makes using it a pain, because it'd usually register movements besides the click, completely defeating the best feature of the TrackPoint, it's pixel-perfect precision. It was never as quick to use as a mouse, of course, but I could always position the cursor exactly where I wanted before clicking.
The second or third gen X1Carbon used a clickpad. And an LCD bar for the F1-F12 keys. The two design decisions were reversed in the next iteration of the laptop.
Alas, the L series thinkpads have the trackpoint but rely on the trackpad for clicking. Nice fast machines that have good battery life (e.g L440) but...