I've had my HDX7 for 6 days now and I just have to everything on the HDX is so easy. I already knew I liked the Fires as I already have a HD6 (passed to hubby now) but I needed more storage so I took the plunge and bought a 64GB HDX7. I absolutely love it. Everything works seamlessly and I've hardly any blue edge, in fact I never notice it at all.
I had issues with the android Facebook app but I have no problems at all on the HDX. I've sideload Dropbox, Sky +, Kobo, Moonreader Pro and Firefox. I've sorted my audiobooks into collections, added music, watched prime, read books, synced my Laptop bookmarks, added bluetooth speakers, tested personal hotspot with my iPhone, and everything just works perfectly, first time.
I can't ever imagine being without a Kindle Fire again and one things for sure I'll never buy a 16GB again. I like having much of my content on the device not in the cloud.
Ohh and I got two Amazon origami cases, a pink and a purple for less than £23.
I'm just really happy and had to share.