Well, and this is unfortunately the point which will probably make you think different in a few months or even weeks. I have the device since 1,5 years and have to change the batteries everytime after about 6 months. Towards my mind this is too short.
Addionally - and this makes it really worse - you can stop looking at your 100% battery level as it is simply not true. The device will show this all the time and then suddenly drop to 0. That’s it.