Extremely mediocre. Some fun traversal mechanics, but for the most part they're wasted on samey colorful but uninspired environments with bad gunplay and mediocre gameplay otherwise. A bit of slog to get to point a to point b with little in the way of rewarding elements from doing the task to what you get out of it. I typically think about half of borderlands' humor is poor, and this copied all of its notes out of that half of their book, and didn't bother crafting much of a story beyond that. There were fun bits, but mostly it was a disappointment. The best part was playing with a pal, but that only enhances it slightly, and makes it faster to beat.