Received my 600mw transmitter in the mail the other day, replaced my 250mw with the 600mw and went for a flight. The difference I found was the view was a little clearer in all areas I fly over and I did not experience near the amount of video interference around buildings that I normally would with the 250mw. Matter of fact I was able to fly it almost 10 feet off the ground behind a building and still get video although not good I could still make things out. Now once the clover leaf antennae come I hope my picture gets clearer and then down the road new goggles are on the list of wants for my quad.