I've had it for 2 days. A 0.0.1 update isn't going to change a massive amount visually, especially now google is moving it's apps to the playstore, i.e. a few months back the camera got a huge update etc etc, but via the playstore, this means functionality can be added without waiting for a system update. The downside is it makes the updates a bit more boring.
Either way, people have reported better battery, better reception on LTE, bluetooth fixed, and the camera humm removed.
There was over 4000 bugs fixed in the change log.