Anyone had any experience with meggytrails harnesses?

I've been trying to harness train my cats but I've yet to find a harness that's secure and doesn't bother them. They like the cheap H style harness I got originally but it's not secure and I'm not comfortable taking them out in it, however they don't like the vest style rabitgoo harness I tried so I've been looking at this one specifically that looks lightweight and is apparently secure.

Also any tips for harness training would be greatly appreciated.