This is probably my least favorite item from my baby registry. I got this tub before my now 3 1/2 month old son was born. We used the sling alone when he was a newborn and it worked fine. Now that he's older, but not sitting up, we're using the sling in the tub part (Stage 2). The sling is supposed to snap in place, but it doesn't, and I wind up trying to slide the baby back in place with one hand while adjusting the sling with the other, all the while, hanging over the side of the big tub. It's great for backaches! Maybe it will be fine once our son is sitting up on his own, but until then, I'm getting frustrated with bathtime!