Comments about Apollo A320 Regulator with Comfort swivel:

Location of ports on the first stage is bad if you want to use PDC transmitter or Apollo Bio filter.
I've seen people use a short extension LP hose on transmitters.
As for BIO filter it is a bit hard to screw/unscrew the canister to remove the moisturising pad.
It rubs Occy hose and does not leave any space for hose protector.
If you don't mind this little inconviniences, than it's not a bad reg at all.

Comments about Apollo A320 Regulator with Comfort swivel:

Great second stage - breathing is effortless, and the swivel really cuts down on jaw fatigue. The layout of the ports on the first stage makes things difficult if you use a wrist computer with a large transmitter; it basically makes it so that everything else (potentially bc, octo and reg) have to plug into the other side (and only 2 of the 3 ports on a side are LP, where all three of these have to plug in! - Conundrum...) I solved the problem by getting an in-line octo, so BC and octo only take one port.