I bought this to plug into my Power Mac and it is perfect. Sits very neatly on the desk, feels great and has two USB ports built in. This micro version does not have the number pad that most keyboards have and is much more like a laptop keyboard. I prefer it this way as I rarely used the number pad anyway but if you do need a number pad Apple also do a larger version with this incorporated.
Overall I am really please with this keyboard - I think it is sensibly priced and looks great sat next to my Apple monitor as both have aluminium finishes which really work well together.