The compressor is a good item, but I don't care for the modulators.
Back when the "top Gun" was first included in the Magnum radios, I put one on the bench and looked over the o-scope signal with the TG on and off. When on, all it seems to do is jack the carrier portion of the signal way up for the period that modulation is happening, then allow it to drop back out as soon as modulation ceases. I haven't had a chance to look at the signals closely on a spectrum analyzer yet, so I can't comment on whether any actual sideband increase is happening.