Even with our dollar going glub currently this is a great deal on possibly the most useful game ever. Assuming that you wish to learn to play guitar or bass, of course. :)
Just plug the magic cable between your console and axe, do some quick set up and learn to play.
PS4 direct link: http://www.amazon.com/PS4-Rocksmith-2014-playstation-4/dp/B0…
Xbone direct link: http://www.amazon.com/Rocksmith-2014-xbox-one/dp/B00NPG4MU0/…
Price equates to around A$60 delivered, so a $29.95 saving over retail here.
Buy before the end of January and you can also redeem a Jimi Hendrix DLC pack for no charge ($US29.95 when redemption offer ends).
The only caveat is that if you wish to use DLC, you'll need to buy it from the US PSN store (I'm not sure on the situation with Xbone DLC). I had a US PS3 version, and DLC will apparently be importable from that at no charge.
Here's what I wrote about it when it hit the PS3… http://gamesblip.com/review-ROCKSMITH2014.htm
Sounds like for the DLC they'll dig deep into your pockets.