Ok, so once again I'm clueless as I don't remember the slings being around last time I was having a baby

Help me with the sling I want - you guys are the gurus

Basically I want something that will last as bub grows, that both DH & I can wear & something that I can breastfeed in comfortably.

My SIL had a babasling she used for both of her girls & swore by it, but I remember they weren't in it for very long past the newborn stage? I may be wrong but I don't remember her using it with either of them past the 2-3 months.

I also want something I can wear for a while without my back being in too much pain - something I can wear if I go grocery shopping etc.

I trust you ladies more than the sales ladies in the shops so thanks in advance