I just had patello-femoral replacement. (Knee cap was cut, reshaped, and a new under side was placed on the patella). I am 4 weeks post-op and doing great. All my pain and suffering, prior to the surgery, is gone. (Oh, I had this done to both knees at the same time).
I had the option of knee replacement (this included the patella) or have the patella surgically removed. If you remove the knee cap you severally limit your mobility, range, and quality of life. Think of the physics behind moving the knee. If you remove the cap what is left? How will the knee area and leg move? Look at the bones in the leg and knee, see how they work together to let the leg bend/move. What will happen if you remove the patella?
All surgical procedures should be carefully considered, researched, and discussed with your doctor (and/or family/friends). Do not rush into anything. Do not let the doctor or somebody else decide for you. You need to feel comfortable with your decision (you have to live with it).
Good luck...If there is anythig else I can tell you about let me know.