I like mine about 90%, but I use my AT Propointer more.
Here is what I don't like:
Little slow in turning off and on. It takes a second or two. No problem, but I used mine during a competition where it matters.
The vibration is a little subtle at distance, meaning a coin is just barely inside of detecting range, it vibrates a little too slow for me. The advantage is the sensitivity can be adjusted way out. With gloves on, it can be missed.
I bought two. The first one worked like a charm. The second was a back up and it acted funny from the start. It sometimes would not come on and then it wouldn't come on at all. I had to pay $8-10 to send it in for repair (it was only 6 weeks old) and then I was sent a new one. Shame I had to pay extra for something that didn't work correctly from the start.
Othewise, it is my favorite pinpointer right behind the AT Propointer.