The spacebar key is extremely sensitive, to the point that lightly touching the key will cause a load of spacebar inputs. I believe this is a fault as none of the other keys act like this. Either way it is unacceptable as it makes typing accurately on this keyboard very difficult as you end up with random spaces in text. Haven't tried it on any games yet but I doubt jumping everytime your hand is near the spacebar key is ideal either!
Other than this issue the keyboard is very good quality for the price with little deck flex and the lighting options are okay and suit my setup.