I have just bought the birth to potty easyfit tots bots. The easyfit ones have built in wrappers so you literally just use them like a disposable. They fit up to 35lb.
You need a liner with them. You can get flushable ones cheaply or you can get reusable fleece ones in packs of ten.
You get a booster in each 5 pack of the nappies and there is a pocket for the booster to go into if needed. Boosters help if your baby wees a lot or for overnight. You can also buy extra boosters separately.
Tesco had an offer on last week on the easyfits. 5 for £35 instead of £70. I got 4 packs as my local real nappy group advised I would need 20. I bought an accessory pack from Boots which had a pail to put used nappies in, disposable liners, mesh bags so the nappies can go straight in the washer and a bag for putting used nappies in while out and about.
I only started using them yesterday but they are lovely. So soft and comfy for DD and they look adorable. They also havent leaked so far unlike her disposables and they dont leave marks on her skin like disposables do. My DD is only 10 weeks though (and absolutely tiny) so I dont know how they will perform on an older child
I was originally going to hire a few different ones from a nappy library but I saw the Tesco offer and thought it was too good a price to miss. I was baffled too until I went to the nappy library and got some advice.
I hope Ive not waffled loads without answering your question 
. Hopefully someone with more experience will come along!