I tried Boss Pure and find it decent - it has a nice mimosa note alongside a slight grassy note. Does come across as quite pure - albeit a bit simple and thin.
The only Boss scent that I've tried and found worth purchasing was Hugo XY - a scent that is very minty but manages to avoid smelling like toothpaste. It's simple and doesn't evolve much, but that's exactly why I got it. There are days you just want something simple, and this will be particularly refreshing in the extreme heat (should it ever arrive here ).