I picked up this little device for $39 when they ran that sale a couple weeks ago. I ended up downgrading to Fire OS 5.1.2 and then rooted and flashed on ASOP. Basically have a Nexus-eque device on the cheap and have been enjoying it thus far.

All in all it took me 45 mins to complete the root / install but this was mostly just going slow and reading up on the process. The actual flashing and rooting portion of the job only took 15 mins.

For those interested I have bookmarked a few links that guided me through the process (this was my first Android device. Yes I am late to the party).

XDA Index Page: http://forum.xda-developers.com/amazon-fire/general/index-am...

ASOP Guide for Fire 7: http://forum.xda-developers.com/amazon-fire/orig-development...

Firmware Download Page (Used for Downgrade): http://forum.xda-developers.com/amazon-fire/general/unbrick-...

Handy Video Tutorial from Root Junky: https://www.youtube.com/watch?v=QZjD4ME4wlI