I wear the Dansko professional clogs (with the back) and I really like them. The arch support is the best EVER, and my feet rarely hurt after a long shift. I agree with the ppl who said they're not great for a lot of walking (particularly FAST walking) b/c they're made so that your heel fits loosely and kind of flops up and down a little when you walk. But in my job in LTC, I do a lot of standing at the med cart and short walks, so they're perfect. The ankle turning thing did happen for a while till I got used to walking in them. They're also incredibly well made. I've had mine over a year and they're holding together beautifully.
They're sized a little weird, meaning they're meant to fit a little big. When in doubt, go a size up. Mine felt HUGE at first (I ordered from Ebay therefore didn't try them on-NOT recommended!

) but now they feel lovely.
I wore tennis shoes to work today (casual friday) and ended up missing my Dansko's!