I actually wasn't a huge fan, honestly. The entire thing seemed pointless; why go out of your way to set up this elaborate ruse to trick some weakling into letting his guard down? Frieza could have just picked Frost up and tossed him out whenever he liked.
It would have been cooler if Frieza's betrayal lasted a couple episodes, and ended up with him being in a position to pick off every single remaining fighter in U6 in one swoop.