It's a good movie. But it's very historically inaccurate. I actually love Britannic, she's my favourite ship. Well, but about the movie, its nothing compared to Titanic 1997. I watched this film after I watched Titanic, and.. eh.. this film kinda felt weird. First of all, Britannic listed, not capsized. The sinking is wrong and kinda confusing. I mean, the ship sank in the morning, not night/afternoon.. So yeah, its really inaccurate. Even though I understand, in 2000 we did not knew much about HMHS Britannic.
Overall, its an OK film. I dont recommend watching this if you're looking for a historically accurate film. Plus, the CGI, special effects, the "love story" are sort of, you know, weird.