Jurry's still out for me, but I think I'll end up happy with the purchase.
I'm happy with the speed on the internet and love the POTENTIAL that comes with open source platform. Some things I really want aren't in the box yet, and are either too troublesome to research / figure out right now, or just aren't available.
My hopes / disappointments...

• spreadsheet program--GUI & fully usable
• shift-click capability in web browser
• Ctrl-click capability in web browser
• Real USB--like a computer should have!
• MMS (I think it's possible now, but too complicated for me to dive into).
• more elegant double-click capability in browser
• white noise generator (on N-800, I could use FM radio without earbuds plugged in to get this. In N900, FM radio won't come on at all w/o earbuds plugged in).
• OVI support!

Some of these I knew weren't included (USB, MMS). Some I was very surprised by (Browser shift & Ctrl-click, FM Radio disabled w/o earbuds, and still no gnumeric spreadsheet).

After seeing how N800 capabilities improved in its first year, I'm optimistic that I'll end up very happy with my N900. Optimistic, but not certain.