This album is a bop! Overall, it is more rap-centered, but there are still a few different genres. Mafia In the Morning has a slightly different concept from Itzy's previous title tracks, but I know Itzy to be pretty experimental anyways.
In my opinion, the title track isn't my personal favorite and is not the most unique, compared to some of the other ones like Wannabe and Not Shy. I don't know if it's just me, but MITM didn't really stick to my head that well at first and sounded strange, but only after listening to it a few more times, my ears eventually got used to it. However, some of their other songs (let's take Not Shy) were very catchy, even at first listen, and the song had a nice balance of vocals and rap.
Now for the b-sides; my favorite is Tennis because of the Mamamoo and slight Twice b-side vibes. I definitely think that they should have put Wild Wild West in the Not Shy album because of its similar atmosphere.
Anyway, to sum it up, Guess Who is a nice album; worth the listen!