I've got a HAB...and after taking a little while to get used to it, just love it.

We took Felix down the dog beach last week and I wore the sling...it was so lovely!

Initially, in the first few weeks, he didn't like the HAB much...mainly because he's not one to like having his head tucked away. But as he has got older, he loves it.

Today I did my mopping with him in it!

Regarding the material becoming too stretchy as they get older, we haven't had that problem...but he's only 6 months.

The other good thing about a HAB is they have a great resell value!

Good luck in your choice!