4bar Fuel Pressure Regulators....who has one?

Excuse the dumb question but what are the benefits of running one over the standard 3 bar FPR?

Do they simply pump more fuel into the engine to enable higher boost pressures to be run?

As i'm Jabba'd, Blueflamed and soon to be FMIC'd should I be looking at getting one?

I have one but thats just because its a required part of the revo remap,don't think jabba bother so you should be fine as you are