I really enjoyed it and especially liked the mix of languages which meant that half of it was subtitled!

I found it very gritty, real - Ken Loach's trademark style.  It was also powerful not in a we won in the end way but by showing the reality of daily life for Mexican immigrants and how appalling conditions at work are for them and how this impacts on the home life, living on poverty wages with no healthcare or pensions. Then the huge resistance to unions on part of the employers, obviously, but also the fear on part of the workers, making it so hard for the unions to find their way in.
When they finally won, that telephone call to the jail cell seemed too neat but I won't get picky on that. It was an excellent film.

Ad astra per aspera