How good are wireless headphones in a live/DJ setting?

I was thinking of breaking the mold and buying a set of wireless Sennheiser headphones to use while in a live/DJ setting. I'm starting to get into DJing but I just want to make sure nothing would screw up the wireless signal. Not that it would be that severe of a problem. I'll be using Numark iDJ2 turntables for house parties. Are there any reasons why you might think that wireless headphones wouldn't be good to use?