The movies aren't horrible. Aside from the jarring 3D transitions and a few omitted plot points it was alright. For people who aren't anime enthusiasts it's the best entry into the series as I don't really expect newcomers to commit to 24 episodes. The 2016 series is a huge step down even from the movies.. Huge
I honestly wouldn't
ever recommend the movie trilogy to a newcomer. They simply don't work as standalone products because they cut too much context and characters, which makes them downright inadequate for people who want to get into the story properly. Even the really big events were hit or miss, like the battle of Doldrey is barely coherent in the movie adaptation. Even worse is the fact that all of the political intrigue involving Griffith is just gone. No Queen of Midland, no poisoning or fire, nothing. There's not a single scene left.
Because there's so much stuff missing, and because what
is there is so rushed, even the biggest moments lacks any sort of punch. Gutts slaying 100 men might as well have been just another regular quarrel by how blandly directed and impactless it was. Even the things they did get right, such as the Eclipse itself, end up feeling hollow since everything surrounding it doesn't complement it as well as it should. Judeau, Pippin and the others non Caska, Gutts and Griffith band of the hawk members might as well have been random grunts in the movies by how much they actually contributed, so their deaths don't have nearly the same impact.
The movies are alright as pure fanservice for people who are already familiar with the story, but the manga and the 90's adaptation are still the only proper way to introduce newcomers to Berserk. The trilogy might be better than the new anime but that's not really a compliment.