I needed to take a look at my Zenwatch 2 because it stopped making sound. It was a fairly simple repair. It was what I thought it would be. The speaker was clogged full of debris. Nothing a quick teardown and mild cleaning couldn't fix though. It was nice to get a look at the inside of this thing. It's pretty serviceable. I like to rate my devices by how long I think I will be able to keep them going. With the only connector, battery, and all moving parts being easily removable/replaceable I'd say this this should last quite a long time.