My Ergo is fab - DH wouldn't wear the babasling (too complicated?!) but loves the ergo for either front or back carries... Plus it's quite a "manly" looking sling - especially when compared with all the "pretty" ones!!
I love my slings but Mark insists on using a proper Back Pack carrier. He is really into him hiking and so it is like carrying his normal back pack to him......and he thinks it is more masculine
He would probably not object too much to an Ergo if I got one though - maybe I will invest in one for the next one