I had a Close Carrier for DD1 that I used for about 9 months and then I used the Ergo. DD1 was rocked to sleep when she didn't fall asleep at the breast in one or the other for 18 months of her life.

For DD2 I have a Sling (Breeze Baby) and then a Beetlebums Buckle (very similar to the Ergo).

I have to say I much prefer the Sling but a proper ring sling. It is cooler (temperature wise) and easier for us. It is also smaller so fits in my bag easier etc. I wouldnt recommend the minimonkey though as I think it has padded rails? One without is much more versatile and easy to adjust/get comfortable. I also find it easier for breastfeeding in. I did love the Close Carrier too but it is just so bulky and hot.