Das and Ducky's are high-quality, no question, and their price reflects that. The folks on the mechanical keyboard subREDDIT have a real hard-on for 'em. They often own several models, have boxes of extra keysets. . . they even buy fancy (or gaudy) custom-molded keycaps. Out of the box, they're kinda spare and utilitarian though, which seems to be all the rage these days. Maybe it started with the DAS and the blank keycaps, but then tenkeyless became 'cool', then they made the keyboard base thinner, so that the keys appear to stand up higher. The worst crime of all is that they often eschew dedicated multimedia keys. I can't abide a keyboard that doesn't have volume controls of some sort and a mute key, and I much prefer the full complement of play/pause, stop, forward/back. My machine's pretty much my all-in-one entertainment center.
I DID see a pretty slick-looking Ducky with a volume knob (knobs rule), though it was nearly $200. The g910 isn't perfect, but it has a lot going for it when goes on sale for $90. It has the dedicated multimedia keys I crave, mechanical keys that rate 20 million keypresses more durable than Cherrys, uses the same config software as my Logitech mouse, has a nifty app that can use a smartphone/tablet as a secondary screen (the next evolutionary step from the g15's monochrome LCD screen), and has pretty, shiny, individually-programmable multicolored lights that fascinate me like a crow with an old scrap of Christmas tinsel.
I particularly like one feature of the g910, where you can program a key to reflect a 'cooldown' on an in-game command. Say you can only use something once, than you have to wait a minute until you can use it again - you can make the key go dark, or change color until the minute is up, then change back to the normal color. A nice way to remind you that there's no point in trying that command, it's not ready yet. Sure, some games will have an on-screen indicator, but it doesn't hurt to have another one right there as you're trying to activate it. ( The preceding is a function controlled by the game, and you cannot program this yourself at this time.
) Or suppose you're playing a fantasy game, and you're a wizard. You can have the keys that activate your fire spells be red, your ice spells blue or white, acid or poison spells green, etc etc.
If I had the extra cash and they spiced up their product with a few more features, I wouldn't mind having a Das or Ducky, but Logitech is no slouch. They may not have the prestige of the other names, but their products aren't known to fail or break often, and they make good gaming peripherals with cool and/or useful features. It's all pluses and minuses, and at the Black Friday price of $90, it was too good to pass up.