LR, I had a similar sling - a pocket sling (otherwise known as a ring sling). I found DS1 hated being cradled in it (actually he hated being cradled full stop!!), but had great head control from birth, so we used it for the kangaroo carry from early on. DS2 on the other hand loved being cradled in it, and for months all our outings were spent with him asleep in the sling, leaving my hands free for DS1. I never really used the hip carry with DS2, maybe because we were comfortable with the kangaroo carry until he was too independent and wanted the pram or to walk, but I did hip carry DS1 quite a bit.

I guess my point is that they are all different, and what suits one child, won't suit another. But the versatility of slings is great as you have so many options.