Even if it is usable, for you, it is not color accurate due to the reflections - which was my original point.
Reflections have nothing to do with colour accuracy. How do you think video professionals manage with grade 1 broadcast CRT monitors? With a CRT you have no choice but to have a glossy screen!
The fact of the matter is that if you are doing serious colour correction you *have* to set up your environment properly in the first place. Even if you had a matte screen I'm afraid that doing colour correction in a room with a window with constantly varying light colour temperature and brightness doesn't cut it for professional work.
Lastly, if you want colour accuracy then you need a dedicated monitor that is designed for that purpose. The colours on Apple's LCD might well be nice, but they are rubbish for showing how highlights are being handled because the monitor simply can't cope well with showing detail over a certain level. Most Apple displays are only 6-bit too, so once again for professional work, even without reflections, they are not really suited to the purpose.