I bought a 24" iMac in February. I was happy with the glossy screen itself. Colours were amazing and picture quality was excellent. The screen was a bit too bright for my liking (on the left side only, see below). Even with brightness set to minimum, I still wished to reduce it further. I got tired in the eyes, but I guess this is just a matter of getting used to it. My big problem, though, was that the screen suffered from the gradient issue. It was extremely bright on the near middle left side of the screen and got darker on the right, with the right edge being darkish yellow in colour. For this reason I returned it, and dare not buy again.
My verdict: Glossiness - OK. Picture quality - amazing. Just hope you never experience the gradient issue.
My verdict: Glossiness - OK. Picture quality - amazing. Just hope you never experience the gradient issue.