the manuals on disc are thourough, but difficult to use and read. you need a computer to use it. the paper manual is better in that you can sit down with your fav beverage and browse away. that said, i would stay away from the haynes manual. they have a tendency to tell you that it beyond the capability of most home mechanics to do XXXX and to take it to somone with more skills!!! first of all, nothing is beyond my capabilities, hell if they can do it so can i. save some $$$ and buy a factory service manual from the likes of "helm". its worth the extra $$$
To answer your question a TRUE FSM in an electronic format is great. I wanted a hard copy so I printed it, the whole thing, double sided, on a Ricoh copier. I never use that copy outside, I read it to my kids as a bedtime story . I print a new copy of what i need for under the Jeep and throw it away when done. Also, if I just need to check specs or something it's easier to just pull it up on the computer.
I use the professional version of AllData and I'm very happy with it. The coverage isn't perfect, but if they don't have the information you're looking for on the website, you can call them and they'll fax it to you. You can print most of the information, including wiring diagrams.
I think the DIY version only covers one year, make and model.
You can't teach an old dogma new tricks.