I switched to them recently... I love them. They fly great, they are really bright and I've had no issues turning them on or off. I had one bad shot trying to get my sights moved and shot about a hundred yards behind my house into the brush and searched for a half hour trying to find my arrow and gave up. Right at dark I looked out my window and at about 200 yards could see that nock shining bright, I was amazed how bright it was.