If it was entirely like the first half it would easily be their best album but tracks 7-12 just don't hit as hard as the others. Best Song Ever is good but it isn't the best song, that's definitely You & I or Midnight Memories. This would have been the last album that we used to have on CD and it was probably around this time that they were at a cultural peak so it does mean more to someone like me compared to an average person who really isn't into One Direction or boy bands at all.
It's still all around a good album but I think if I were to throw on a single 1D album I'd still pick Up All Night but this is an easy second place and the first three are just iconic.