I had the chance to join the first and second Prime_E group buy that had an aluminum case but could not justify the price tag due to my unfamiliarity with the Alice and 40% layout.
However, the current Alice and acrylic stack layered case fad convinced me to try out the Prime_E. I really enjoy typing on this board. It didn't take long to get accustom to typing on the board, especially after I customized my layers.