I've been wearing custom orthotics made by a podiatrist for 15 years. Fulltime wearer. Got them because I was darn near crippled with plantar fasciitis at the time. Having one pair of orthotics sucked due to all the changing between shoes. On a whim, I ordered a set of SheepFeet this past Christmas so I wouldn't always have to be switching orthotics in and out and just to see if I could find something that matched my customs in fit and quality. I have been wearing the SF for about 5 months and find them very comparable in build to my customs from 15 years ago.
I hear people say SF are too expensive... I paid $350 15 years ago for my orthotics and just paid around $230 for the SF with full length, double thickness and heel cup. The SF are a bargain when compared to the podiatrist version.
All that said, my SF have worked very well. I wouldn't get SF without the heel cup. It took a little break in period, to get my feet used to them even though I'm a daily wearer of orthotics. My plantar fasciitis has been gone a long time and I thank my custom orthotics for curing me. The cost of a custom orthotic is a small price to pay to have feet feeling great and being able to do long hikes