I just came from the last full show at our cinema!
I enjoyed it like the first one! I watched it on IMAX and I must say, I think I would have enjoyed it better in 2D because the 3D glasses of IMAX makes everything darker and the actions were too fast paced to appreciate. Gonna watch again this week!
All right for the good stuff:
Definitely a strong start! Opening battle blew me away!
I really enjoyed the twins. Their power display was awesome! I like how QS speed is toned down a bit compared to DOFS. I think it depicts his level more accurately.
Wanda -- what a scene stealer! When Hawkeye said "If you walk that door, you're an Avenger" and DAMN SON SHE REALLY WALKED OUT THAT DOOR!

Love her hexes and magic!
Finally, Black Widow gets to use a weapon that isn't just a pistol. She was really leveled up in this sequel.
Humor, humor, humor. It wouldn't be an MCU movie without those classical punch lines and awkward scenes.
Love the cameos! From Stan Lee, to Agent Carter and Falcon!
Epic battle was epic. Enough said. You could feel the unity in the battle. Iron Man, Captain America, Thor, Hawkeye, Black Widow, Hulk, Scarlet Witch, Quicksilver, Vision and even War Machine, Nick Fury, and Maria Hill, and the rest of SHIELD!
Things I liked the least:
The BW and Hulk thing felt a little sudden to me. :P
There were a couple of times I THINK I heard Olsen letting her American accent get the better of her.
And most of all, QS's death

Man, I honestly thought the devastated and supercharged Wanda was gonna use some Omega level magic to bring QS back. Sigh, I feel that it was such a waste of character.

I hope he can comeback in MCU somehow (exactly how, I don't know).
A few more hiccups here and there, but basically I enjoyed it a lot! Super!