I wore a range of orthotics for a time (years) but though they helped initially they never cured the plantar fasciitis. The negatives of orthotics, in my experience, were very bad:
- they altered my gait and posture;
- were painful at times;
- worst, they damaged my feet (I had some 3/4 length orthotics that, combined with tight shoes, over time pushed some bones in my foot around and caused more problems, so my advice is always to get full-length orthotics if you do get some);
- I never felt "stable", meaning my feet did not feel solid and balanced on the ground;
- I could never go barefoot, ever, which I love and do now all the time
- were very expensive
- the dr's would just say, 'oh you don't have a good fit' and i'd pay for another style
Needless to say the happiest day was when I threw all mine out and started stretching every morning. I eventually took up yoga to stretch out not just my feet, but also my calves, legs, back etc and it was like a miracle in curing my fasciitis even though it took a very long time and patience -- it was FREE and way better than orthotics.