Pros: I have only had the product a week but walking my dog is a treat. I no longer feel exhausted when I walk her because I am walking naturally. It is really cool and it just feels good! No back pain or foot pain. In my Nikes I would take off my shoes and my feet would throb. My KSO's do not feel like that.

Cons: My only concern is the KSo's are a little tight. It can be hard to get my whole foot in the whole on top. I find that I put my toes in then bend back the heel and it is easier but it still takes some work to put them on. I think the classics are a lot easier to wear. I wanted to get the KSO's because I am going to Costa Rica next month and I want to swim, hike in waterfalls and wear them in the hot springs.

Other Thoughts: You may want to try one size bigger because mine are pretty tight and they leave and impression on my foot. Don't get me wrong they are not painful at all. Also if you order online be sure to try them on carpet so they don't get dirty and you can return them as needed. Mine instantly had debris on the bottom from my wood floor. If you can find someplace that sells vibrams locally I would suggest trying them out before you order here so you have a better idea how they will fit you.