no google play store (so all the apps I have bought for my phone I cannot get on this box for free)
no root, so cant install apk easily
I am looking at THIS TRONSMART S89 - supposedly does 4k too... and is much faster than firetv. The only negative is you cant do Amazon Prime as amazon have blocked that for Android (surprise surprise!) In the UK Prime is using Silverlight.
I think we had towelroot in May? or it was later anyway so much changed since may