In my (admittedly short so far) time Iwith the phone I can't say I've noticed any drawback that could be because the screen is pentile. Are there any kind of test patterns/images I can get to from the browser too see if it is actually pentile? It has to be said that the screen is really good, and in sunlight it outperforms the N900 dramatically.
Being a hwkb guy I have to say I really don't like the portrait VKB (big hands and fingers) and would have preferred having a T9 option, at least for one handed use. Perhaps I'll like it better when I get used to it. In landscape the vkb is ok.