There are a few more features in version 11 but I admit I only upgraded from 10 because Acronis e-mailed me informing me my purchase of TI 10 entitled me to one free software upgrade and please accept TI 11 for nowt.
I also like to keep up to date and have accepted the upgrade to V11. Because I have updated regularly I was eligible for the 40% discount and that coupled with the current favourable dollar exchange rate meant that it cost me only £17.70 which I consider to be money well spent.
A word of warning; Like Technotiger I upgraded because I like to keep up to date & also I reckn TI to be a superb piece of software which has helped me on many occasions. Now for the warning: I sucessfully upgraded my XP machine but failed with my W2k machine. Checking on the Acronis forum it appears that there are some serious bugs with V11 & the general opinion on the forum is to stick with V10 until there is a new release of V11.