I used to advise on them and sell them. Both my kids wore them and I'm a firm fan. Some of the posts on here are unfair and misleading at best so I'm going to try to dispel some of the myths.
Firstly, babies are in the first size for a relatively short time. I used to advise to get a mixture of styles and types to see what worked well for you, your baby and your lifestyle in that first size. Personally I loved terry squares on a newborn as they contained everything (unlike disposables) and dried quickly on the line. I had some shaped nappies, some more like the Bambino Mio, but I wasn't a huge fan of those, pocket nappies which were fantastic overnight and all-in-ones. Each had advantages and downsides. That is why I would recommend speaking to an advisor or local nappy library.
You don't need to hot wash them. A rinse if they are really bad then a normal 40 degree wash is fine. Don't use fabric conditioner as it coats the fibres and makes them less absorbent. Instead use white vinegar in the rinse cycle. Ideally, line drying is best as sunlight bleaches out any stains. However, if you have a tumble drier and can afford the costs, lots of people find it very convenient. I coped with 2 in nappies and no tumble drier, just like my mum did.
As far as the comment about "walking funny" from someone upthread is concerned, I'm afraid s/he needs to do more research. Babies with clicky hips are actually told to use a cloth nappy as it keeps their legs better apart and allows the hip to take the correct shape, similar to when my dad had a hip replacement and the nurses had a wedge cushion between his knees for the first few days/nights to keep his legs in the correct place and allow the joint to align. Babies just learning to walk have a cushioned landing when they sit down suddenly on their squishy cloth bum compared with a disposable, especially on hard floors.
I loved them, my DH was keen and the girls themselves became adept terry folders at around 5 or 6 for demonstrations. However, they generate a bit more work; the amount of which is up to you. I found when starting out to do one cloth then one disposable. I would congratulate myself for every cloth nappy I managed as it was one fewer going to landfill and that encouraged me to use more of them. Finally, I can look both girls in the eye and say that we contributed very little to the waste mountain and they are most welcome to use their old nappies on their own children as they are still here and in great condition.