It supports midi keyboards and VSTs so its pretty powerful. Nothing like guitar hero as it's a proper DAW :) I've been running the 2013 version for a while so hopefully this is a bit of an upgrade.
I got two emails, one with the coupon and one with a serial number. The 2016 free version is 8 tracks and 1 soundpool whereas this 2015 free version is 16 tracks and 3 soundpools. It also gave me the option to install a pack of additional sounds and instruments. Had a play around and it seems brilliant for free!
The thread on 2016: https://www.hotukdeals.com/freebies/magix-music-maker-2016-version-was-44-99-now-free-2673096
Tried this but all I got was a coupon for 10 pounds. By the way, 2016 version is available for free download without a key: http://www.magix.com/gb/music-maker/
Much appreciated jyonda, thank you Edit: All working, downloading now. I also found out the password needs a number and a capital letter to be accepted.