Can't vouch for the TVs, but I owned one of their 1080P monitors in the last 2000s/early 2010s. Upper-middle quality, very basic OSD, great customer service. Used the monitor for ~7 years before upgrading to a 4k, sold it still working with original cables & box.
Walmart has better stock of Sceptre TVs last time I checked. Unfortunately they only make dumb 4K TVs up to 75"
(I was looking for 85", so I just unplugged the WiFi module in the TV I bought before I turned it on the first time.)
Also, taking a look at the site, and not a single 4K UHD TV is in stock at the moment. Yikes!