Great watch, will watch again, and can recommend.
Even though this is from 2005, it's amazing that when you have a futuristic world, it holds up over time as the 2020 new tech doesn't seem to matter as much, or you design characters that wouldn't have average technology, this sort of does both.
Ewan McGregor, Scarlett Johannson, Djimon Hounsou, even Sean Bean, Steve Buscemi and Michael Clark Duncan. This has a great cast and clearly had too much money to work with. There are all sorts of sci-fi effects, crazy constructed sets, and some really over the top action sequences for this premise.
And this premise is excellent: a clone discovers he's a clone and makes an escape attempt, it's a race for survival. The writing is excellently paced, and structure with a little too much of an establishing act, but it's useful and not boring, so that's still good. The leads truly embody the characters, showing a line between ignorance and intelligence: they are ignorant of societal constructs but incredibly intelligent as they've spent the last 3 years attempting to escape a puzzle box.
The mechanisms to keep the pursuit of the fugitives going are all rather seemless, and there is open discussion of morality of the facility's actions by most of the cast without harping on about it.
There is science and action abound, please enjoy.