Little Brother is useful for English practice if you can already follow natural conversations. Listening can be difficult because the dialogue moves at around 143 words per minute, leaving little time to process each line. Learners will hear plenty of useful natural English, but some lines may still require a second listen. The storyline is easy to follow, so missing a few words should not stop learners from understanding what is happening. If your English is near B2/C1, this can be useful practice, especially if you start with English subtitles.