I loved the layout of the Ergo 4000, in particular the fact they shortened the space bar and moved modifiers like the Alt keys inwards. That’s one thing that’s almost impossible to replicate with other keyboards.
Unfortunately they let me down in durability. I must’ve gone through 3-4 of them in the same span of time as OP. Obviously our use patterns must be different. The pads and keycaps would wear down and the membrane would fail.