Clicking is hands-down the hardest problem with this type of device. Their hardware mouse button placement is not ergonomic; the user in their video has to use a separate hand just to click!

• If you allow tap-to-click, users are likely to trigger false positives from resting on the keys

• If you allow press-to-click, users will be unable to click in many positions (e.g. the intersection of 3 keys)

You could even do click to tap :)

(Which I would to appreciate, as both clicking and tapping has never been the most reliable for me on touchpads.., but a keyboard click? Always reliable, and always responsive)