I just took the AF renewal a few months ago for the 7th time. I paid $99 in 2003, but did notice (as one poster pointed out) that the price is now lower. It really is a bargain. I can confirm that the arbitrary time limit is gone, and you could feasibly get it done in a day or two.
In years past, there was an option to download the source material as a PDF, but I couldn't find it this time around. Instead, I just copied and pasted each page into a word document for quick future reference/study.
Perhaps one of the best features was the ACR renewal. This was the first time I got to do it with IACRA. The last 5 times I paid for the ACR, as it was always a pain to set up an appointment with the local FSDO. That still required a little leg work, as I had to mail in an 8710 along with a copy of my driver license and notarized document (but still a lot less time then waiting on the FSDO). With IACRA, you can now do everything paperless and online. I went from the first FIRC chapter to printing my new temporary certificate without getting off the couch. Gotta love technology!