The material is lighter and causes less strain on your hands.
In addition, yarn can slide just a bit differently depending on the material of your hook. There's a tiny bit more tension between these and your yarn as compared to that between metal and yarn.
I'm often torn between buying a single piece vs a number of pieces at once because what if I don't like the feel or weight of a style and end up with a bunch of them? However, I've yet to meet a hook I don't like! Getting at least the basic sizes all at once means I won't have to go on the hunt for the rest of the pieces later down the road.
These five choices all have at least 12 of the most common sizes and a few even come with a nice leather case so you can keep them all together.
Dark Bamboo Crochet Hook Set with Case
20 Piece Bamboo and Metal Crochet Hook Set and Case
Set of 12 Solid Bamboo Crochet Hooks
Light Colored Bamboo Crochet Hook Set
20 Piece Thick Sturdy Bamboo Crochet Hook Kit