I just installed fedora 18 on a couple computers and found the new installer works fine. It wasn't any more or less 'disorganized' or 'confusing' than any other distro, including doing custom disk partitioning which I see is one of the big complaints people have had. Works for me. It looks like it's going to evolve swiftly into a very capable tool.
Unfortuantely the one system I hoped to actually use I installed on a laptop that has Mageia 2 installed already. My first 4-5 attempts to set up dual boot with the two have failed. I'll be digging into this over the weekend, but there may be one or two insurmountable problems, fedora used grub 2 (and installed the images who-knows-where) and it used LVM. We'll see, but I'm not going to lose sleep over this one. (btw Mageia works, I'm using it atm)
I don't see what all the stink is over the new fedora installer. It's worked well on 2 installs now, one on an old beater system that ended up completely set up and ready to go out of the box. Next up: try whole disk encryption.