Very good, but ...
The keyboard is of excellent construction. It's very solid, which inspires robustness and also helps to absorb vibrations when typing, further enhancing the silent feel of the Cherry MX silent switches. All in all, an excellent range of keyboards that I'd recommend... except for this particular model. Let me explain.
Yes, the yellow isn't necessarily in the best taste, but I could get used to it. The problem is that the letters are in white (on yellow), and the result lacks the contrast I need to make out the letters properly in less than optimal lighting conditions. This phenomenon is exacerbated by the fact that the letters are not transparent and don't let the keyboard's backlighting pass through. This is a real problem for me, as I'm often geekering in the dark.
But since I got a great deal on the keyboard, I thought I'd treat myself to a set of keycaps. And that's where the second problem arises. This is a 65% format keyboard. The 'alt', 'fn' and 'shift' keys on the right have a very particular format and it's mission impossible to find ISO, French azerty and backlit keycaps that include them. So far I've found one vendor who does, but for over £100, which is almost the price of a new keyboard.
In short, very good stuff, but buy it directly with the keys that suit you, or switch to ANSI Qwerty US format. I'm seriously going to go for this option in the future, as it's still the most common format for keycaps.