This is an excellent keyboard. The keys feel fantastic, with a great typing action. The nipple works perfectly, and comes with several spare caps (I replaced the one it came with by default, which had a sandpapery texture to it I wasn't very taken with). It's not going to replace a mouse (or even a trackpad) for more precise work, but for general use, it's fine.
However, while the internals of the keyboard are very nice indeed - it has a significant heft and feels like it will last for many years - the case is a bit of a downside. It's generally okay, but the build quality feels cheap compared to the rest of the keyboard, and there is some give at the bottom corners where the two halves of the case clip together. It's not a huge issue and overall I'm very happy with it, but I do worry that the case won't last as long as the rest of the keyboard.