I read the books beforehand on the recommendation of basically everyone on the internet. They were enjoyable, felt directed towards a younger audience, were a little too sweet at times, and yet had some very clever storytelling. Re-readings increased the appreciation. The movie was, simply, fun. Like the books, it veered into sweetness too far for my tastes, but overall the movie has such an energy that you can't dislike it. Although coming in at a weak 5th place its opening weekend, the movie really needed more people actively not disliking it.
There were many nice touches, both from the books and created for the movie. The 8-bit opening logo, the flashy battles, Kim Pine's glib hatred of everything, Comeau's all-knowing chatter in the background, and Wallace Wells scene stealing. The movie was definitely its own creation. There are a few complaints (the final scenes with Scott+Knives+Ramona seemed rushed and insincere) that are ultimately inconsequential when measured against the mania of the film as a whole. It feels a bit like The Fifth Element in this regard. Planning a second viewing.