I've been using Logbook Pro for about two years now, and am pretty happy with it. Compared to some I do that much with it - enter times, occasionally check various.

Support has been very good (APDL's per diem calculator doesn't handle international per diem rates, and there's no fix coming in the near future is really my only gripe). Other issues I've had have been solved in one or two emails, and they imported my old logbook file for me, since my old logbook wasn't one that was listed to import.

Overall, I'm quite happy and recommend it to others.