It is a great movie. I'm only superficially familiar with comics!Deadpool, but I loved the film. Fair warning: it earns its R rating (or whatever the equivalent is where you are).
Even though Negasonic Teenage Warhead is supposed to be a, well, teenager, she hit my Goth-girl fetish right between the eyes. The black lipstick, the attitude, the boots, the coat, the buzzcut... oh yeah. I wanted to do bad, bad things with her.