Definitely try samples first!
I'd definitely recommend buying samples of this before committing to a full size bottle - from the online images there were several shades that looked like they might work for me, but I ended up with a darker one than I'd ever have chosen as the others oxidised spectacularly within minutes rendering them super orangey. They also give much more coverage than the 'flexible' description suggests so I don't rely on this as my only SPF (the coverage would be way too much), and apply just a few drops over top of my untinted SPF 50.