I generally buy two pairs of shoes for a trip - one pair "athletic" sandals and one pair of running or hiking shoes. I wear them in advance enough to know they will work but not so much that they aren't fresh and new looking.
I've raved about Reikers in the past and my Reiker sandals seem to be fine. But the Reiker sneaker type shoe has let me down. They felt so comfy when I chose them but the other day I wore them all day at work then all evening for lawn bowling. No chance they're going to Europe in September!
Just bought a pair of Merrells that I expect to be much better.
A warning to not assume that a trusted brand will always work.