Borderlands 3 is the 4th game in the series, because counting is hard.
With the prerequisite 4 vault hunters, Twelvety Bazillion Guns, and Looter-Shooter gameplay, one would assume this formula is fairly hard to muck-up, yet muck-up seems to be Gearbox's M.O. currently, and Muck up they have.
But first the good stuff, Areas are expansive, far more so than the first 3 games, and the scenery is well crafted, with plenty of detail wherever you look.
Gameplay is good for the most part, with the classic borderlands "feel" still very much on display, and the new running slide move is also a welcome addition to the formula.
The Vault hunters seem varied, I've only given Zane a go so far, but if the variety in his skill tree is anything to go by, then one of the 4 shall suit almost any play style.
Missions come in the standard Borderlands flavour of "Go here and kill stuff, possibly collect a thingy or two while you're there" and are fun for the most part.
Vehicles are varied, and can be customised with parts from other vehicles, which are scanned into the nearest Catch-A-Ride.
AND THE GUNS! Possibly the best bit of the game, the new Shotgun physics are a joy to behold, lots of weapons have alternate fire modes (Auto/Burst, Fire/Corrosion, ETC) and some even have shields of their own and can also boost your action skills.
Now to the bad stuff.
Movement can be generously described at "Twitchy" with precision feeling just a hair out of reach when trying to get to the myriad of collectibles and audio logs hidden about the maps, also not fun is the new movement tech of "Mantling" or "Climbing on boxes" to you or I. Seemingly copied by a guy who saw 20 seconds of Halo 5 gameplay one time, like movement, mantling is twitchy at best, often denying you climbs that you should have easily got, yanking you up to ledges you missed by a mile thanks to the twitchy controls.
The voice acting is fine for the most part, despite the new Claptrap, but it seems nobody bothered to check which lines go where, as more than once a civillian has talked over a mission line, confining that line to the void, never to return, and Echo logs which seem to have finished, so you activate something else, only to have the echo continue, and instead of the lines Queueing, they're just discarded too, possibly making speedrunners happy, but leaving the rest of us wondering where the dialogue for their mission just went.
Enemies are fine in the early game, but to ramp up "Difficulty" later enemies are immune to certain weapons or elements, which seems like a great idea until you come across one that has such a combination of skills, you have hide round a corner and whittle them down bullet by bullet or their AOE weapon will turn you into the consistency of canned potato salad.
Bosses are probably the biggest offender, from feeling like you did well against a difficult but well matched foe, to feeling like a raid boss with how crappy and unfair their gimmicks are, the bosses are probably the biggest disappointment, as they just feel lazy and untested, especially the last few.
The UI has taken a huge step backwards as well, with no "North" indicator on the map screen, which now rotates to whichever way you're facing, just to confuse you, the Inventory screen feeling more cluttered than it should, and the skill tree screen feeling more unnecessarily complicated than the screens of Borderlands 1 and 2.
The writing is a huge letdown from the first games too, with lazy "humour" and irritating unlikable characters, 90% of the jokes just failed to land for me, and I found myself not giving the slightest crap about these people, despite the game forcing me to to progress the plot, which seems to have more holes than Osama Bin Laden's jumpsuit.
Quest rewards sometimes go into the "social" tab in your pause menu, because they can't just GIVE you a gun, you need to go into a menu and click stuff, because everyone LOVES extra steps to do stuff!
AND THE BUGS! Which I'm sure will be patched, but currently the framerate slows to a judder if several enemies die at once, there's a notable pause bringing up the skills/equipment menu's, as the game presumably loads them, Weapon icons and info stay stuck on screen if you pan too quickly, obscuring your vision, kills often fail to count during "fight for your life", Mission critical characters get jammed in scenery, the list goes on.