Both the Tactile Pro and Mini Tactile Pro are equipped with premium ALPS mechanical keyswitches, similar to those used in the legendary Apple Extended Keyboard - widely viewed as the best keyboard Apple ever made.
There's no mistaking the keys for those on a mushy membrane keyboard, but they aren't quite as firm or crisp-feeling as those a traditional mechanical keyboard like the Tactile Pro either.
In pre-production testing of the Modbook Pro, Modbook Inc. found that solid-state drive options offered a number of clear advantages over mechanical drives.