One nice thing is their content seems unique and different from what you find on other free streaming sites.
This is a partial list of the type of content you can search for and find to watch on Plex for Free:
10 Cloverfield Lane
Dirty Rotten Scoundrels
Four Weddings and a Funeral
I Dream of Jeannie
I Saw the Devil
Leaving Las Vegas
Series are perhaps not as strong. Some I saw:
Teenage Mutant Ninja Turtles
The Dead Zone
The Lucy Show
The Usual Suspects
Tucker and Dale vs. Evil
Their ads are like many other free channels, usually 3 or 4 different ads per commercial break with many that play over and over again.
Plex has a channel or app for pretty much everything including Roku, Apple TV, Nvidia SHIELD, and for PC or Mac.
Watch Plex TV Here: https://www.plex.tv/watch-free/