I purchase one of these after have the g19 for about 2 year before a few of the g key start stick and not work . they be both very close in design with a few exception . this g510 have a slight more `` rough '' feel of plastic on both the wrist guard and the key . the g19 have a smooth wrist guard and smoother plastic key . the key on the g510 however have more a `` solid '' feeling to they . the g19 feel like the key would `` wiggle '' in place a little bit , while the g510 feel more sturdy with the key . of course the g510 do not have the usb port which be not that bad since I never use they and all they do on the g19 would heat up the part where the usb port be when it be on . only complaint with the key be the space bar , it have to be press all the way down or or wont read the keystroke . if you just lightly tap the space bar with you thumb , you will be find yourself miss a lot of space typing on this keyboard unless you correct you typing . the headphone and mic jack work , however I do have a few complaint about they . with no headset plug in , the volume wheel control system volume . however if you plug in a headset to the port , the keyboard basically `` load '' the driver for it in Windows and it basically become like a second sound card . however if you unplug the headset , it `` unload '' the sound card from the system . this would not be a complaint except the volume wheel control the headset only if it be plug in . so because I leave my headset plug in all the time , the wheel become only useful for the headset 's volume , not external speaker . as for the lighting , this be where it have lose 1 star . the lighting be much dimmer compare to the g19 and also the g13 game-pad . I still use the g13 game pad and the screen and key on the g13 be about 1\/3 brighter then the g510 . because of this , the key compare to the g19 can sometimes be hard to read in the light . it still can be see well in the dark but it should not be dimmer then a previous model , if anything they should have make it brighter . the layout and extra g key be nicer , much better then the 2x2 design that be on the g19 . the g19 the key go 1,2,3 . . in a vertical fashion which I do not like . the g510 correct it by make they horizontal , which be easier for the brain to remember in the heat of a battle in a game . I do not feel like put $ 160 for another g19 , and I do not much use the color lcd screen much , a monochrome one show the same basic information . the only downfall be the dimmer key compare to the g19 . let we just hope that this keyboard will not start get sticky key like the g19 do .