The Marvel Vs. Capcom 3 Strategy Guide is one of the best fighting guides that I've every read before. Everytime I turn the page, it's outlaid with so much information: from the simple stuff like Crossover Counters, to combos that can destroy your opponent in seconds.
The best thing about this guide is each move is very detailed, telling you the different frame rates and if the move is OTG (off the ground) compatible.
The combos that the guide gives you are amazingly accurate and can be followed easily from the book inself.
The guide is very detailed in many of the new additions of characters and the newest moves like the Crossover Counters, Team Aerial Combos, and such.
Jill and Shuma Gorath are in the guide, so once you get them, you can use the guide to help you master them in no time.
There's so much information, to where you actually have to sit down the first time and read it. No joke.
Though not a big thing, the titles that you get are all there, BUT the part where you get the event titles aren't there because the events weren't added on until the guide was released, so it is incomplete.
Get this guide. It's as good as any of the really big guides, like Resident Evil 5 and Final Fantasy XIII. It'll help you with the noobs too.