I recently purchased one of the Sceptre TVs and overall am happy with it. The only drawback I found was the sound is not great: it is tinny and muddled (possibly because it's wall-mounted). I'm planning to buy some external speakers.
...but it doesn't have any of the smart TV BS. Still takes too long to power on, IMO.
It takes wayyyyy too long to power/boot up.
That being said, I just hook up my own speakers.