Couldn’t stand the small rubber nub function keys, and the as you mentioned the echo was off-putting. Also zero customizability in the split nature since it’s one massive plastic hunk…. Excited for the advantage 360 this summer as they finally are addressing this by going split and ditching the function keys
The rubber nub function keys were replaced with plastic keys in the most recent version, much more pleasant to use. I'm sad about their departure on the 360. It's a huge keyboard, I want more keys!