Summary: Had it for a few days now and I absolutely love it. I was not sure if it was worth the extra money over a membrane keyboard but I'm really glad that I did. The keyboard feels really well built.
Summary: Well, like the first poster, I have only been using the keyboard for a few hours but I think I can already see some benefits in the operation and general "feel" of it. Like that poster I was confused by the need to use both the USB AND the PS2 lead to get a functional and backlit keyboard, but that apart it seems good. I am slightly concerned that there is a "dry joint" somewhere in the lead set but since it is not causing any problems, I am bearing with it.
Summary: You note I've said first impressions "good" rather than "very good" or "excellent" or "awesome". I know I will almost certainly have to come back and write an update to this at some point after owning it for a few weeks. The size, spacing and action of a keyboard are things to be learned and adjusted to. An overall verdict isn't possible the day you get it. So this is definitely a quick overview, as it came out of the box. Can I mention the box?
Summary: Not only does this keyboard have Mechanical MX Brown switches, which have proved to be good for word-processing (haven't tried out the gaming aspect, yet) but it has 4 levels of brightness for the blue backlight, really easy to set up and control. It looks great, it feels great, it's a really nice medium size, it will fit on any desk-space. And the cherry on top is the full sized Enter key, because that's quite hard to come across among gaming keyboards.
Summary: I have been trying some of the games for Linux found on the Steam site. To my surprise, I found that a few games did not like my USB keyboard, so I bought this museum piece. It works perfectly, and is probably a little quicker than the USB one. Highly recommended to gamers, at least.