I really like these straps. I have tiny, child-size wrists and these can easily be tightened sufficiently so the watch isn't continually rolling up and down my forearm !! They're easy to fit, though I'm a person of no patience whatsoever, so if I can manage I'm pretty sure anyone can.
Do check your sizings, though. I ordered the wrong ones at first....those 2mm make all the difference ! I like the colour selection as well and it's nice to swap them about depending on your mood or what you're wearing.