I did notice this was not in stock at my local Best Buy. I am not sure they set up to many soundbars in the store. However, I have this one and it sounds really good. It will give you a Theatre like sound and the built-in subwoofer sounds pretty good. You can also connect your phone to it with Bluetooth and play music. You can use any device you want with the soundbar that is connected to your TV. The soundbar connects to your TV via a provided digital optical wire or an HDMI cable. That means that any sound going into your TV from any source will play out of the soundbar. The hdmi cable will give you HDMI arc which will enable you to program your universal remote to control the soundbar volume. Otherwise, you will have to use the soundbar remote if you use digital optical. Since the sound signal is coming from your TV into your soundbar it will play anything that is connected to your TV including a firestick. They probably just meant you can not plug your firestick directly into the soundbar since the soundbar hdmi is just used for hdmi arc to get the sound signal from your TV.