I have been debating getting one of these. I have an ABC carrier, is this really any different? I also have a baby trekker but my son doesn't like when I put him front carry in the wrap carrier (he likes the front facing but not the dangling) so I don't think he will like the trekker at all.
Now that my DD is over 14 lbs it is the ONLY carrier that doesn't give me back pain. LOVED the Hotsling and Mei Tai up until about 23 lbs -- but after that I neede the support an Ergo could give me. LOVE, LOVE, LOVE mine!!!!