Made the switch myself not long ago. Only thing that annoyed me: I was still forced to connect the device to "activate" it. Even though I use VPN on my router, it still seems silly that the device I purchased requires such activation. Anyway, after that I installed KoReader (along with a font called ChareInk6SP) and started to transfer epubs from Calibre via KoReader's Calibre plugin. If you have a large collection on Kindle I would suggest you first try and get those into your Calibre before doing anything else.