AOA isn't a group known for their b-sides, however being someone who listens to quite a lot of albums I've noticed that they do have quite a few golden ones. I'd even go out to say AOA have more than a handful of good b-sides, and "Angels' Knock" serves that notion.
1.) Excuse Me
Arguably the best song of the year yet. It's catchy with a great retro dance theme. This song from start to finish is great from the addictive pronunciation of "excuse me" to the beat drop with Jimin's rapping. It's both classic AOA and a new spin if that makes any sense.
2.) Bing Bing
This is "Excuse Me"'s lesser but I don't think it's terrible. It took a few listens to have it grow it on me, and I can say, I enjoyed it. It has that mid-2000s big brass sound that had they elaborated a bit more on the song it could have been just as good as "Excuse Me." The problem with "Bing Bing"'s problem is that it almost feels like demo, the verses sound a bit too bare in comparison to the chorus and even that could have been better. While I like "Bing Bing" I feel like there are other songs on the album that could have gotten the second title track slot.
3.) Three Out
"Three Out" has a great introduction and everything else is just, well, solid. My only problem with the song is that is sounds less like AOA and more like AOA interpreting "Twinke Twinkle" era Girl's Day. It's a bit too twee sounding with the lighthearted vibe and toyish chorus. I feel like AOA Cream or even I.O.I would have had a better chance with this song.
5.) Can't Sleep
6.) Lily Feat. SF9
7.) Melting Love
8.) Help Me (Korean Version)
9.) Oh Boy (Korean Version)
10. With Elvis
Overall I think "Angel's Knock" was the right move for AOA; they had a rough beginning scrapping of the bits of shit from netizens before eventually gaining some traction on the charts, so that's good. It would be a shame to see AOA burn out at a time like this. I can pretty much recommend all but two songs, "Three Out" and "With Elvis." It's definitely worth a listen.