I should give this game a proper review at last, it's a crime to leave TPS wtihout it since this is one of my fav games of all time.

I wonder why people love(?) to hate this game and call it trashy in comp. to BL2, because in my humble opinion it's the most fun entry in pre-BL3 era :V
By the time spent in TPS you can tell how much I adore it. Hell, I even 100% it!
The story was fun and interesting; new mechanics with oz kits, slams, jump pads, lasers, cryo weapons - all of these add such cool flavor to game overall that I never was bored replaying it. I especially love that protags finally speak and more vocal in action, BL2 made me feel distant and non-present because our heroes are mostly silent. Because of this tiny addition I had more motivation to replay Pre-Sequel just to hear all unique reactions of every character possible.
Also characters skills seem to be more polished and clear to understand? It was easier to get familiar with character you've been playing and using their ults was way fun (except Claptrap maybe).
Developer could just make a story on same planet with same enemies but they went further and allowed us to explore Elpis and all funky creatures and places on it. Maybe I am bias, maybe this is just nostalgia speaking since I've started this game almost 8 years ago (holy hell), but I always have a weird cozy feeling while playing TPS.
Give it a chance, especially while it has generous discounts, don't listen to those who call it the weakest one in the series.

PS: I forgot to mention the music - it is my absolute favorite out of all BL games here, almost each track is saved in my playlist and memorised in my head. Especially music from Claptastic Voyage slaps really hard.