I got a Logitech Pebble i345 today (the iPad-specific Pebble—ordered it awhile ago and they finally shipped) and it's not bad, but shows the "may cause interference" message on both my 7th-gen iPad and my 2018 12.9" iPad Pro. Functionally, it seemed fine, but you'd think Logitech would've solved that (at least for the Pros if there is something to their antenna arrangement).
Other than that, it seems no different than the prior Pebbles, and maybe a bit worse—for the same price, they come in other colors and have Bluetooth or the Unifying Receiver (USB). Mine just has the embossed Unifying logo next to the pairing button and a hole to store a nonexistent Unifying Receiver.
If you go to the bottom of the screen and keep moving downward (hard to describe) it takes you home for models with home buttons, for USB-C Pros, you can click the home bar.