Why is there 3 extra buttons at the bottom of the space bar?
Those buttons will be annoying, since now you'll have watch where you rest your palm, without accidentally hitting one of those.
This like the track pads on laptops, if it's too sensitive, then it may cause some typing problems if it's accidentally hit with the palm.
Those 3 extra buttons on the bottom of the keyboard are very nice for MMO games like World of Warcraft which is absolutely fantastic specially for binding extra macros for faster ingame spell/ability cast! I Love it like coolaid on a hot sunny day!