These shoes are absolutely comfortable. I live in a variety of Birkenstocks all year round except at work. They help my plantar fascitis almost reducing it's pain to null and probably would completely except for the fact that I have to wear leather boots at my work.
Try these they are great for fall weather wearing jeans or khakis.
The only problem with them is a inner piece of leather ( where the two pieces of leather meet tends to bend back as you are putting the shoe on. I just slide a finger and hold that leather piece and slide my foot in and problem solved.