I'm skipping the HTC one m8 because of the possible hardware issues and camera cover that's prone to scratching for the z2. I have never used a sony phone before so I do not know what to expect when it comes to hardware issues and updates. Should I be on the lookout for anything when I get my new phone?
Samsung is pretty reliable with warranty and service + updates. HTC is a joke when it comes to after sales support. They've become pretty good with the updates though lately.