I have been using Arccos for about 2 1/2 years now. I got back into golf after my kids left the nest. I started to focus on my iron play, distance and accuracy. It amazing how the testosterone level factors into golf shots for males lol. It’s the best purchase I have ever made in regards to golf equipment. I’m much more confident in exactly what club I need not to over swing and lose control, I consistently hit in the mid to high 70’s on a course where traps are always in the front of the greens! I’m working on the under par round. I have already had 3 people get them, everyone is always asking me about them, how most of my shots are mostly pin high. Trust me I have been playing since high school, 45 years of on and off golf. This product is amazing. I use my phone in my pocket I was concerned with that at first, doesn’t bother me it’s convenient to check distances. I tried the clip on, the clip broke the first day. That sucked. But I found I like the phone better. Highly highly recommended for all golfers to get these sensors. Thank you Arccos. Mike Howe. Included a picture of my hole in one to! Second one