Pros: Dual adjustable buckles, crossable straps
Cons: Older fabric stiff
My favorite features of the Pikkolo are the shoulder straps that unbuckle completely (versus my older Ergo I had before it) so you can cross them on your back for greater comfort; and the dual-adjustable straps, meaning you can easily pull to adjust no matter whether you're wearing it on your back or front.
The one downside was the fabric on mine (an older/original one) was a little stiff, but I have heard the newer ones were much improved. It would sometimes take a little doing to get the baby seated well, but it was possible with tricks they shared on their website.
I have more recently tried the Pikkolo with my DD, seen here shopping at 5wks old. I love the design and that I can use it even with a tiny baby!