PLAATO Airlock question?

Hello I been looking at this thing call PLAATO Airlock it’s a digital hydrometer of Sort. So I am just curious if anyone in this forum has ever use’s the PLAATO before an how did you guy’s like it?

Me did look at this. And a friend of mine uses it in holland. He checks his fermenting temp at work on his phone. He does like it. Think its kind of pricy. But a cool gismo to have.