This was my main carrier for a long time. I first bought it when ds1 was about six weeks old and carried him on and off in it until he was nearly two years old.
There was a time I would have praised it heavily but having had the opportunity since to have tried out a greater range of carriers and slings, I don't think it is anything like the most comfortable of its type and I very frequently felt midback pain or strain in my neck and shoulders if everything wasn't put on just right.
However, I do have a sense of loyalty to it. As a first time mother, the fact that baby was held safely within the internal pouch while transferring or trying a back carry was very reassuring. The range of fabrics was very pleasing. Dh enjoyed it and wore it very frequently when out and about. It was particularly good for those nervous first back carries when ds1 grew a bit older. I liked it a lot and it served me well, but I reluctantly have to admit there are others that do the same job better in terms of comfort.