I needed a new hi viz and grabbed one of these Apidura ones to replace the Ultimate Direction vest thing that has never sat right on me, on the basis that a hi viz that's too uncomfortable to use is useless, so I might as well pay more for something better made. I don't always wear hi-viz, but some of my nocturnal adventures benefit from having it (I've been known to venture up dual carriageways in the dark, and good hi-viz is a better prospect for nocturnal running than trying to light my body like deep sea plankton).
It's a lot heavier than I expected. My existing hi viz would fly away if you sneezed on it. This is quite weighty. I'm right at the top end of the S/M size because of my chest, but they said to size down -- I'm glad I did, because it's snug fully done up in regular clothes, and would be flappy if any larger. Besides that, it's what I would call Mum reassurance levels of reflective and brightness, and fits closely without flapping or feeling like it will twist itself around my torso like a hungry python at the first opportunity.
ETA: Having read the label, it's only good for 5 wash cycles, so maybe take that into consideration given the price.
Sam