The only person I know who bought one, likes it.
While I am in basic agreement with those who say there was no need for it, because the .357 magnum can be loaded with anything from light .38 Specials to super-hot hunting rounds, I also think there might be a niche for it, in a snub-nosed personal defense revolver. You could carry six SD rounds, without giving up much in likely effectiveness to the .357, and probably very much better than the .38 Special with +P ammo.
My main concern would be the noise, and ammo expense. The .327 magnum is basically the same thing as the old .32-20 rifle cartridge, and my experience with shooting fairly hot rifle rounds through a pistol is that they have an ear-piercing discharge, as opposed to just the big boom from a large caliber handgun.
Also, whereas you can find cheap .38 ammo to practice with, none of the .32 caliber ammo that can be fired through the .327 magnum is cheap.