I bought the Kogan sound box as a secret Santa gift. Then I had to install it. It was reduced to about $100 but is usually around $135. It has optical feed, five speakers and a built in sub.
For the money I was impressed.
I have my own home theatre which I put together from components and I'm not suggesting that it would be anything like that, but for general tv viewing and the odd concert at tv viewing levels the sound reproduction is quite accurate.
If you are wanting a soundbar to watch movies with, don't waste your time or money. A $200 5.1 from your local electronics shop will do it better. Sound is pressure, 5.1 is pressure from around the room - simple physics. You can't fake it although Bose has been trying to for years, and you certainly aren't going to get 5.1 out of a 3ft stick and a sub. Nice sound, yes, 5.1, no. Stereo music of any quality - only if you sit 3 ft in front of the sound bar.