It definitely wasn't a good buy. I was dreaming about new keyboard with multimedia keys to control mp3 player instead of binding strange global hotkeys like Ctrl+Alt+Home, so I was more than happy when I chose nice looking A4-Tech X-SLIM KL-7MU model with USB, headphones and microphone extension cable. It was part of my hardware upgrade together with new processor, motherboard, monitor and more. I've also installed Windows 7 then.
It took place 1.5 months ago and I've experienced many things since then. Most things work fine but I couldn't get rid of strange feeling that coding on my new computer is less comfortable than before. I blamed it on Windows 7 and I was partially right as there is a scandalous flaw in this new Microsoft product - GUI is no longer hardware accelerated! So it's no suprise that I can often see windows and controls being drawn as I move them, scroll them or type my code, even after turning off all the animations, transparencies and even all this beautiful Aero. As a proof, look at this YouTube video: Windows 7 GUI slowness. I just feel like working under Linux before installing graphics drivers. What a shame, a big step backward...
But after comparing my experiences from work with these from home I've noticed that it has to do something with the keyboard. I've always been opposing to "flat", laptop-style keyboards and my new A4tech one is just like this. So I returned to my old-school, white keyboard. Now the GUI of Windows 7 still annoys me a bit, but coding is much better. You may tell it's the matter of taste but as for me, I'm sure now that I prefer to code on a keyboard with high "step", where I can clearly see, hear and feel whether I've pressed particular key or not. I just type faster and make less mistakes on such keyboard. I'm also sure it's not the matter of getting used to it as I tried to use laptop-style keyboard now for more than a month as well as for three months when I've been in USA and in both cases I couldn't start to like it. So now I want to sell my new great keyboard (see the auction). Anyone interested? :)