I like this email tracker, but they have some work to do. The tracking works great, but the impact it has on Gmail could use a bit of work. Specifically, there is a glitch that re-shapes the page to push the tracker on the side when you open each email in split view. This, while annoying, isn't a huge deal. The bigger problem is that the labeler, or whatever you call it, makes the page re-size over and over again. This became such a big problem that I had to turn it off.

All in all, it's a good product. It does what I purchased it for, which is to let me know if someone opened and viewed my email. The other features need a bit of work, but I'm sure they'll get there.