I never loved my moby. Had trouble using it with DS1, and found it annoying to have so much fabric when I had DD. I traded it to someone on another board when I was pg with #3 and bought a k'tan on sale. I did like it for the very newborn phase, but I have biggish babies (8.5-9lbs) and stretchy wraps aren't that supportive IME as they get bigger.
I preferred the k'tan to the moby though.