I haven't. That looks quite close, but still fairly flat.

The mouseman had the left mouse button perhaps an inch higher than the right. Net effect is your hand, wrist and forearm settled at a 30-45 degree angle, pretty close to the natural rest position. That;s the bit I miss - it was really comfortable for long use.

I use the MX500. Had it for 12 years. Took it apart two years ago and washed the plastic parts in dishwashing liquid, still good as new - only the black background of the logo is worn.