I run in Chaco sandals, and have recommended Chacos to a lot of patients (not necessarily for running, just in general). Birkis seem to only really fit a specific type of foot, so I don't direct patients to them unless they already know they've liked them in the past.

If I could wear VFF I'd buy a pair just so I could experience them and pass the info along to my foot people. I can rationalize a lot of shoe purchases that way...

Neutral heel and straight last AND wide toe box are rather hard to find, and I'd like to be able to add a few more shoes to my recommendation toolbox. (Even though I haven't worn them myself, I did suggest them to a patient with great foot posture barefoot, kinda iffy posture in regular shoes, and who prefers sports sandals and moccasins. They seemed like a reasonable match, and she was quite excited about how funky they look.)