Ergonomic it definitely is. I’ve used this mouse in about 3 different ways since I got it - Bluetooth on my Mac and PC, and using the USB receiver on my PC. Here’s what I like: With the USB connection the mouse is pretty responsive and takes about 1 or 2 seconds to wake up. The mouse connected effortlessly with both PC and Mac, no software required, using the different connection options, and that’s it’s fully rechargeable. You can switch the resolution to improve tracking and focus. It’s pretty inexpensive for a device with these features. I have a USB-C laptop and hate using the dongles so I wanted to try a bluetooth mouse. The reviews were decent so I thought, “why not!” Here’s why: I don’t like the sluggishness and latency when using the bluetooth connection, I had to click buttons twice before it recognized the input, I’d drag the mouse and literally wait 2 or 3 seconds for the cursor to follow. It goes to sleep really quickly and seems to be a hard sleeper. I’d wait sometimes upwards of 20 seconds for the cursor to move after leaving the mouse idle for about 2 minutes.on a few occasions I thought the connection was severed and tried to re-pair the mouse with my laptop. Overall it’s a great device, if you’re not solely dependent on the bluetooth connectivity and well worth the price of admission.