The movie itself was very enjoyable. I liked very much how "bas*ss" Venom is (especially in the middle of the movie), the special effects (the way the symbiote somehow looks disgusting to touch) , the actors performance, the funny script. But I liked a bit less the story.
How suddenly the super bad guy turns to be a good guy who's saving the world for alien domination... I know it's a spinoff but I didn't except he could turn into a (that) good guy.
The female version of Venom (should we call her Venoma ? :p ) was also strange, a dog version of Venom could have been more interesting for example.
Also the dialogues between Eddie & Venom (or Drake & Riot) where the head was floating was a bit bizarre. A mirror-like effect could have been more logic (like after the first fight scene where Eddie looks in the car in sees the Venom reflection, or from the LOTR Smeagol & Gollum).
But none the less, as said here above, it's a very enjoyable movie.
Review of Venom
