Imagine, a Hollywood producer got his hands on the game. The result would be similar to what the Cinematic Mod is: a graphics blockbuster, redesigned to the typical game to movie adaption with an orchestral soundtrack and beautiful people everywhere.
if only it's a graphic enhancement mod it would be great. visual enhancements are really great. some times you feel like you are playing a next-gen hl game. but gameplay and map changes hinders this mod from being great. also it takes almost 50 GB of your hard drive after installation! so you'll need a big space for this. also those pornographic visuals on the walls are disgusting and definitely doesn't fit in half-life universe. I'm not gonna complain about those infamous hd models because they are optional now. you can choose originals. if those downsides are okay for you, try it. otherwise don't bother downloading and installing it. you can just look at the scrrenshots.