We are using cotton bottoms with Alfie who was twelve weeks on Sunday. The main reason we decided to go with prefolds was that they are great for drying as the nappies dry overnight next to the radiator.
Sometimes the nappies leak poo so, to contain the breastfed poo we are using a nappy nippa, although getting the newborn fold right, so that you have a little pocket at the back requires a bit of practice. The poo almost always goes onto the wrap, and has been known to leak onto clothes, but it really does seem to come down to how well put on the nappy is. So I wouldn't recommend this system to anyone who really can't be bothered with learning a technique.
I think that when Alfie is weaned we will be able to abandon the nappy nippa (hopefully) and then it will be much faster to stick a nappy on.
We are using a fleece liner and kushies boosters at the moment for absorbancy, it makes the nappy big, but lasts for six or seven hours with no pee pee leaks.
Boosters are just extra pads of material that you stick in the nappy using as many as you think necessary. The fleece liner keeps the baby's skin dry and feels nice, it's very impressive.
Personally, I'm a bit suspicious of a nappy that doesn't need to be changed for a long period, it seems a bit of a bacteria haven to me.
The prefolds are cheap and easy to augment, we just added seven junior joy prefolds in small size from ebay for £4.99.
The wraps are very cute, but can leave marks if they are too tight.
We also have a couple of stuffable nappies, which we bought on ebay, they are not name brands, but seem to work pretty well and are cute, they also dry fast, but I don't think they are up to the challenge of a messy poo, quick to use though.
YOu can buy second hand from ebay, and if you were to use prefolds this is a good way to do it, as it will save you having to wash the nappies four times to get all the finish off - the more they're washed the better they seem to get, so pre-used is actually quite good.