Yes, it's easy to use relative to other distributions like Slackware, Gentoo, Fedora, and Arch, to name a few.
There are Ubuntu-derivatives that are easier to use than Ubuntu itself; Linux Mint, for instance, comes with a broader selection of software, certain settings like Compiz turned on by default, and ships with multimedia codecs that Ubuntu doesn't have installed. None of this is extremely difficult to setup in Ubuntu, but even as easy as it is many new Linux users seem to find it frustrating.
I would suggest using Ubuntu 10.10 over 11.04...it's much more stable than the current release.
-Anonymous