I developed Plantar Fasciitis in my left foot and it was becoming very painful to limp let alone walk first this in the morning. Of course it got better during the day as you walk more, but spend time in a chair and then get up, 80% of the morning pain would be back again for the first 20 steps or so. I also started to walk on the edge of my foot, which is not a road you want to go down on. (Leads to knee and hip problems.)
I decided to purchase two sets of these Gel Pads (after all, they are cheap enough) and put them in my work shoes and boots. The first day of wearing them felt strange and the pain didn't go away in the foot completely (about 50% of normal), but I was to walking normally. The big surprised was getting up for work the next morning. I was able to walk barefoot normally to the bathroom instead of limping on the edge of my foot. There was still some pain, but it was bearable to allow me to walk normally. This convinced me to purchase another set of 2 of these Gel Pads.
I have been wearing these Gel Pads for two weeks now and I can say they have made a big different. After about a week, you even forget you have them in your shoes. (Just as a footnote, if you have a good foot the Gel pad will feel even stranger but you get use to it. You should put them in both shoes otherwise there will be a height difference which could cause you to have hip problems later if you don't.)