Yes, we have one for DS, we got it when he was 2 - we have a pool - it's great, keeps him afloat and is secure (does up under their crotch so can't come off) and just makes me feel more confident when it is just me and both the kids in the water. However, I did read on here (I think) that a swimming teacher didn't like them as the kids didn't learn to swim as quick (or something to that effect). But for us, it has been great!