I have, and I strongly prefer the TrackPoint--by a whole order of magnitude. I never have to keep my fingers off home row.
I do use a tiling window manager and bindings like Vrome/Vimperator, so my use case is probably atypical. My mouse usage is limited to when I deem it absolutely necessary; I hate physical/mental context switching, and bringing my hand from keyboard to TrackPad/mouse/whatever is a huge context switch.
I have always felt that the TrackPoint (on a HP Elitebook here) is difficult to access from the right or left index because of its place between G and H.
I would use it so much more if it was between H and J.
How do you stretch your finger towards the middle of the keyboard with no issue? Stretching just to type a letter is fine for me (think Y, H or B), but staying on the TrackPoint is hard.
I do use a tiling window manager and bindings like Vrome/Vimperator, so my use case is probably atypical. My mouse usage is limited to when I deem it absolutely necessary; I hate physical/mental context switching, and bringing my hand from keyboard to TrackPad/mouse/whatever is a huge context switch.