It's an incredible film, there's no real lull despite the long run time, it's perpetual motion, like Thanos and his forces, it just doesn't stop coming at you, it's a rollercoaster filled with soul that is equal parts exhilerating, haunting, sad and thrilling.
The film is the Thanos show to a large degree, he's like Darth Vader crossed with The Emperor and they feed him everyone to put over how much of a threat he is. By the time he leaves the ship at the start he's humbled Thor, kicked Hulk's ass and killed Loki, you are left in no doubt of how hard to stop he's going to be.
Tony seems to be in a good place when we see him, are him and Pepper married or getting married? I know he got the ring at the end of Homecoming, of course that happiness is short lived.
I really liked the dynamic between Tony and Strange, magic meets science and even Strange is caught off guard by Tony's ego, but he kept the flip phone Cap sent him!
Our heroes first clash with the Black Order is great, Ebony Maw is creepy as **** and Hulk's performance issues after losing so easily to Thanos bring about my favourite funny line in the movie "You're embarassing me in front of the Wizards!"
Thor's journey in the film shows a renewed focus after Ragnarok and then the attack by Thanos, and his interactions with the Guardians add some levity to all the darkness, especially his little exchanges with Star-Lord.
Cap, Natasha and Falcon showing up to save Wanda and Vision and repelling Proxima Midnight and Corvus Glaive is one of the few cheer out loud hope spots in the film.
Iron Man and Spidey saving Doctor Strange and taking Maw out is another hope spot despite the fact they decide to head to Titan rather than turn back to Earth, straight into hell!
Gamora going with Thanos was a conflict I wasn't expecting and led to one of the more mellow parts of the movie, adding to her character and givng insight into Thanos twisted logic. I was also surprised that Quill took the shot.
This leads to arguably the films best surprise, the return of The Red Skull!

I wasn't expecting that and depsite his current situation it leaves the door open for a full return.
Thanos throwing Gamora to her death to obtain the Soul Stone was ruthless and a gut punch.
The way the Russos never lose track of all the moving pieces and keep everyone present and the pacing on point is a hell of an achievement, and this is never more impressive than in the final quarter of the film with the 3 pronged epic finale.
The Battle of Wakanda was what I went in hyped for and it was filled with great moments, like the MCU's answer to a LOTR battle, and the heroes got some wins with Cap, Widow, Okoye, Bucky and Wanda all shining, and I loved how Black Dwarf and Proxima Midnight were taken out!
However I actually thought the action on Titan was the standout with Tony, Spidey and the Guardians battling Thanos, and they had him beat until Quill's dumbassery!
Wanda making the big sacrifice on Wakanda was some powerful stuff and the Time Stone had slipped my mind, it was like the final hope spot for the heroes, at least Thanos wasn't going to get all 6 stones..........and then he snuffed it out with a flick of his wrist and killed Vision all over again!
Thor has been in videogame power-up mode since the end of Ragnarok and was at it again with his new mega axe, but he missed his shot and now we have a third of the heroes left.
Up until this point I could see why so many had came out drained as Thanos presence is overbearing and it feels like the heroes are hopelessly under his boot for the bulk of the film, but all of the doom and gloom and kids leaving in tears didn't really make sense as Cap and Tony were still alive and so was everyone bar Gamora and Loki.......then the heroes literally started disintergrating in front of my eyes, I was not expecting that, obviously they are going to be resurrected in Avengers 4 but damn, that was a bleak ending!
Brilliant film though, they took chances and did an amazing job delivering the biggest menace of this kind since 1977, all wrapped up in epic action, haunting dramatic moments, great character interactions and even a few laughs to light up the darkness, the film is a thing of bittersweet beauty!
9/10