I really like the low profile design of this product. It really clips on to a headstock discreetly compared to other options like Snarks. The screen rotation button also makes it easy to optimize the display for reading regardless of how you clip it to the headstock.
What I don't like about it is that it sometimes doesn't sense low E. I'll have to pluck the string a couple times and sometimes resort to using harmonics to get it to pick up the vibration. This is the case on multiple guitars clipped on multiple headstock locations so it's probably an inherent weakness in the product's design.