I can't recommend the Fire TV Stick. I used it a couple times. All video providers (Amazon, Netflix, HBO Go) constantly hitch where the picture hangs for a moment and the sound continues, then the video moves in fast-forward to catch up with the audio. It seems nearly all owners experience this.
That's a minor annoyance, but the major annoyance is the RF remote. I have bad hearing, so I skip-back a lot to catch whatever I miss. No matter how quickly I press the skip button, the devices frequently thinks I held the button down and it starts rewinding or fast-forwarding. Drives me ABSOLUTELY INSANE. It just seems like the CPU is too busy processing something to respond to input events and realize I'm not actually holding the button down. I think that would also explain the strange video hitching problems everyone seems to have.
It's definitely not related to WiFi signal quality or congestion. Mine is on a 5GHz network that supports 802.11ac -- and it's only 5 feet from the router. All of my devices (desktop PC, printer, Apple TV 4, Playstation, NAS, etc) are directly-wired except for mobile devices (phones and tablets).
With so many other options for Internet streaming devices, I just don't use the Amazon Fire TV stick at all.