I’ve got a Blaze and quite like it. I acknowledge that step counting might not be totally accurate but at least it’s consistent so I can see how I change over days / weeks etc.
It’s good at autotracking exercise and the function works well so I dont tend to interfer with it.
I should add that it’s not that “smart”. It tells me I’m receiving a call or got a text message and controls my music but that’s it (which is all I want it to do anyway).
It’s not too big, it’s quite flat and I’ve not used the interchangeable straps but it’s a nice touch.
I should add that I use a Tom Tom multisport for tracking proper runs / rides as the Blaze doesn’t have built in GPS and relies on your phone (which I don’t take with me).