I am still using this camera and I'm enjoying it very much. It has become my most used SLR, my other two Nikons are the F5 and the FM2, the former is too big for causual shooting and requires so many batteries I must plan its use. The latter is great but heavier and slower than the F55. Two observations after using this camera for 2 years:
It occasionally gets confused with non-standard films from the likes of Adox and Cinestill that have unorthodox cassettes. It can refuse to acknowledge the reality of a film in the camera.
Secondly, the AF is not that good and under low light the camera has this 'AF-Assist' light that comes on. It works fine and the camera has always been accurate but, and a big but, that AF light ruins any hopes of a candid shot. You can, of course, switch off AF but the viewfinder does not make low-light focusing easy.
Edit - a third observation: I'm still on my first battery with this camera.