Pretty solid but could use more features.
Pretty solid push mail, but could do without the graphical gimmics and backgrounds and such, I think they slow it down a bit.
I wish it could also support the native email folders (as in yahoo, also download the folders I have, since any email that gets filtered to any place besides my inbox won't be sent to my nokia).
Also contact grouping (chat-styled) like in gmail would be great.
Also something that could help you save new contacts.