I've stayed in an OV on deck 3 and liked it a lot. I worried that the noise from the atrium would be bothersome but it wasn't. And it's a quick flight up the stairs when coming in from a port.
I'm sure a 4-night cruise will attract a slightly different crowd, but that probably wouldn't stop me from booking one. 😉
Avoid deck 7; the noise from Eden at night is annoying.
(We were on deck 7 on Apex; I am not sure if the issue would also happen on Edge, but I wouldn't be willing to take the chance. We ended up changing cabins.)