Edited: In looking at it again - I forgot that it does have a wider-base option and can be used for back carries. OOPS! Sorry. However, the straps look a little wimpy.... I would still suggest a different SSC honestly.
They are similar to Baby Bjorn and have many of the same limitations -
the biggest one being that the "seat" area for the child is very narrow, making it less comfortable for the baby than other options, and making it last only a few months.
Other soft structured carriers have a wider base. These put the child in a more seated position, so they are not effectively hanging from their pelvis bone. This also means that it will fit for many more months. These other carriers are also more supportive for YOU, making it actually comfortable to keep carrying up to and beyond one year.
Finally, the positions are limited in the Lille / Bjorn / Snugglie type carriers. Those are mainly used for front carries. It's nice IME to be able to put the child on your back - very ergonomic and great for older babies while you're doing chores - it gets hard to get anything done once the baby gets big enough to take up a large chunk of your torso space, lol.
While the Lille / Bjorn / Snugglie carriers are popular because they are shown in a facing out position, a lot of experienced babywearers will tell you that is actually the most limited-utility position. It is THE most uncomfortable for the wearer - it means the baby's weight will pull away from your body, straining your back and shoulders. It also means the baby can't just snuggle up against you if she gets sleepy or overstimulated. And, of course you can't nurse while facing out.
(I hope... lol.)
So many people think that babies are only happy facing out, but really nearly all of them will do great facing in, or if they crave more stimulation, on your back or hip, and you will be more comfortable. I will admit there is a rough stage for most babies from about 2-3 months where they are starting to get curious enough to want to see out but don't have the neck strength to turn their heads well in the front-facing in position and most parents are scared of doing a back carry at that age... but it's a quick stage, I promise.
Alternative soft structured carriers...
-Olives & Applesauce
there are lots of others too but those are some of the most readily available ones.
Sorry for the novel, lol! I get carried away.