I'm the minority here - I have the K'Tan and DS hates it. I was only able to wear him about half a dozen times, and that isn't for a lack of trying. He screams most other times and would continue to cry until I give up 10 minutes later. I think DS somehow just doesn't like the confinement. I wasn't able to do the Kangaroo position w/him, and he tolerated the hug position those half dozen times only. Maybe I got the wrong size? I wear size 2 and got XS. When DS is in it, it feels secure and snug, but I think DS feels it's too tight for him. I also didn't find it that comfortable either.
I'm waiting him to be big enough for the Ergo; hope he likes that better than the K'Tan.