Impressions after Testing
I am a VERY heavy internet user, both for personal and professional use. Since I upgraded to the TP2 with Opera, it has become my web device of choice - over my netbook, laptop, and desktop.
This latest version of Opera Mobile shows great promise in terms of it's rendering capability, ease of use, and interface. This is actually, the closest I've ever come to encountering the full web on any small mobile device including the much overhyped Jesus-Phone. Much to the contrary of the various naysayers, it shows that, with the proper development, winmo is indeed a great platform for web activity.
HOWEVER, Opera 10 is still very much a beta (perhaps even an alpha). As noted in my post above, it is resource intensive and quite buggy! (It actually caused an out of memory message on my TP2, something I have never seen in my four months of owning the device and using it extensively.) I cannot recommend it for daily use at this time.
BOTTOMLINE: If you're looking for the same basic stability with a little less bling, try the earlier flavors and wait until Opera 10 matures a little more.