Great product that provides customizable comfort
This is a great product, and while it might seem a bit expensive, I will share with you why it is not:  I have *very* flat feet, and have two sets of custom orthotics (obtained from a podiatric specialist).  Those orthotics cost in excess of $500 each.  They work well, and last 10 years plus.  They have done well for me over the years and are what I use in most of my shoes (since they are removable).  But here is where they fall a bit short, and where these inserts step in (no pun intended):  My custom orthotics are hard/rigid material with a cushioned top.  Unfortunately, for some shoes it doesn’t work well - usually because I can’t remove the sole insert in the shoe OR there is still some sort of arch support built into the shoe.  This insert gives you the opportunity to make adjustments to the fit based on your own specific needs, as well as taking into account the limitations with the shoes they will be going in.  You get two sets of ‘pads’ that you can use to adjust the insert wherever it might be needed.  Each set contains 3 different sized pads, and the sets are differentiated by how rigid the pads are - one set is much firmer than the other.  They are pretty easily moved around so that you can experiment with them to get them just right.  The only downside is that if you are using the pads to adjust the fit/feel based on some limitation of the shoe itself (for example, if you can’t remove the existing sole insert), then they aren’t as easily moved from one set of shoes to the other.  From a size standpoint, I wear a size 10 (men’s).  According to the size chart the Medium fits sizes 8.5 to 10.  I almost decided to order a large and figured I could cut it down but opted for the medium and am glad I did.  It is true to size, and it fits my size 10 shoes perfectly with absolutely no trimming needed.  If you wear a size 8.5, 9 or 9.5 you would need to trim the medium accordingly.  But ultimately, the sizing guide the seller provides is accurate.  I am extremely pleased with the fit, the customizable nature, and the comfort.  Too early to make any judgment on longevity though.  I hope this review is helpful to you!
Rating: 5 stars