I use washable and really, really like them but I used disposible up until about 4 months until things settled down a bit and I got my head round using nappies at all and taking care of a baby! If I have another one I'd be ok using cloth from birth now that I've got the hang of it.
My experience has been pretty much only positive. Dh was a bugger to convince at first and kept sneaking ds into disposibles but even he now admits that they are as easy as reusables and just as reliable.
The thing is though that there are so many different types and not all suit everyone. Lots of things to consider such as how often you'll wash, what drying facilities you have, the build/weight of your baby, the type of fastening you prefer.
The good news is that there's tons of help out there. Post on the nappy board and the experts will find you (they'll find you here I'm sure!) - I've had great help from Flamesparrow who sells nappies. There is also a booming secondhand market (really, it's not as yucky as it sounds, cloth nappies wash up pristine) so you can try stuff and sell it on if it doesn't suit. You may also find that there are local council incentives to help you buy your first nappies.
I wash probably three times a week and I just bung in any other washing that I have to do (towels, baby clothes etc) so it really isn't that energy intensive. You do a lot more washing with a baby anyway. The nappies are quite expensive initially but they cost (each) about the same as a pack of disposibles and obviously last a lot longer!
Give it a go! I'm really glad I did.