Evolution
Evolved from the older G15 and G19 keyboards.

The G510 shares a lot with its little brother, the G110 keyboard in terms of features and layout. The G510 has 18 programmable "G-Keys", Windows-Key lockout switch (to stop the accidental the "oh,fck" moments when you hit the Windows-Key) and the most obvious - a 160x43 monochrome LCD backlit screen.

Evolution

Evolved from the older G11 and G15 keyboards - this is the equivalent of the G11 as it doesn't have the LCD screen but it does have a smaller footprint than its ancestors which is a nice change. The G15v1 had what felt like a massive footprint. Although the G110 has 6 less macro 'G' keys, I've never known anyone to need more than 12 (or at least admit to it.)