Elite Keyboards shows ETA May 5th so the reviews should soon follow. It looks like the Hi-Pro has a longer plunger & switch housing with more bearing surface area. Maybe it may improve the stability and smoothness of the already excellent Topre design. Only when the reviews and user feedback becomes available we will know. I'm interested to see what possible benefit it may or may not have. Seems to me its design would be more rugged if nothing else. I really like the keycaps on it and hope they become available.