After years of speculating, I purchased this 1st pair of Birks not knowing what to expect. The cradle your foot is in, is at first difficult to get used to with the ridges but soon becomes comfortable.
They may be good for walking anywhere that doesn't have pebbles, because once a pebble finds it way onto the footbed, you have to take off the shoe to shake it out.
Otherwise the comfort level is definitely outstanding.
I've been advised to not get them wet, that for me at least, is a new concept when wearing sandals.
At this price, they are definitely worth a try.