If you plan to be working in areas with lots of light, or by a window or something then the glossy screen cab be a bit of a pain. I have heard good things about the matte screen from reviews by people who bought it, though no experiance myself.
I have both glossy laptop and monitor, and a matte laptop which i recently bought. Personally I prefer glossy purely because the image it gives out is a lot more clearer/crisp
There is however reflections which can get annoying but to be honest, I have my laptop above a skylight window and there's mirrored cuboards behind me! and it doesn't bother me too much. IF you use or plan to use the laptop outside regularly then you won't see a thing with glossy on a clear day.
Matte on the other hand gives out a nice clay type of effect hard to explain, but it looks nice.