I've been using Family Tree Maker software for at least 10 years maybe more.
I installed the 2011 version about a month ago because I was having problems with my data file in the old version of FTM 16 I had used for several years. The data file was becoming corrupted every week or so which meant I was losing data and was constantly having to reinstall a backup file.
The new version has the ability to upload your data file to Ancestry and then download it direct from within the software. This is supposed to compact the file and fix errors. Well I can say the new version works and is worth the trouble to upgrade. My old data file was large, 142 mb but the new file is only 95 mb.
It makes everything run faster and I haven't had any data crashes since the first week.
The software also has a feature that automatically searches ancestry.com or the Internet via google for anyone in your file that you highlight. So you get a list of census records or whatever that list that person without having to search. This will definitely speed up entering data and finding documented sources.
The menu is more complicated than the old one but all in all it is a worthwhile update.