I have used them the past 2 seasons. I think they work excellent! I usually buy 3. After they burn out I stiil use them for practice as well. I found 2 arrows I would have lost if I had not been using them! I not big on gimmicks but this one I like! I also like them when sighting in my bow, easy to see when my arrow is in the target! I'm not to sure of the weight difference but I noticed no problem, even on paper! My arrows fly-true. Plus they look pretty cool on video as well! Good luck.