I bought these heel/arch supports for 2 reasons 1) I had plantar fasciitis in my right foot and wanted something to help with the pain and recovery and 2) the ones in town were more than double the price of these ones.
At first I wasn't sure they were helping my foot - they weren't making it any worse, but the pain seemed the same as always and the bit to support the arch seemed like it was digging in and was a little uncomfortable. However, a week to 10 days in and I don't notice them in my shoes any more, I've been able to wear shoes that are not Dr Martens for the first time in a month and I honestly believe they are giving my foot the support it needs while it heals.
I saw a chiropodist last week and showed the supports to her; she was quite impressed with the fact that they are not hard and rigid like some you can get, but were more flexible.
One reviewer complained about the fabric wearing away quickly. Looking at mine, yes perhaps the fabric is starting to come away at the edges a bit after just 10 days wear, but in all honesty I don't really care because I do believe they have helped my foot and they are, in my opinion, a value for money price. Definitely better than paying £32 for them in town!
In summary, if you buy these heel/arch supports, you will probably need a few days to get used to having them in your shoes, but do persevere with them because they have been of enormous benefit to me.