I'm using BY602 for me the bottom freezer is really handy as the heavy stuff at the center easy to take it out. no need to bend down to take a bottle of drink for example.

normally freezer just chicken, fish, ice, ice cream etc which you use lesser than the stuff you put in non-freezer compartment.
as for BY602 it can be quite noisy when the motor working hard, you can hear the air pumping noise as well. but most of the time it's quiet and if you never open the fridge door for pro-long period motor running very low it can very quiet.

The noise is tolerate able nothing out of ordinary I guess as I read some where here the VG660 motor when running high also noisy.

Moisture vegetable case is a good features you can keep your veg longer.