Been running the base KF1 with DG's insecure kernel now for about 13 hours and it is very stable for me. The only thing I haven't really tested is GPS performance but otherwise this is the smoothest stock rom by far. I had one FC with Google Voice that I restored with TiBu when trying to switch my Voice Mail Carrier to it but the second time worked fine. Otherwise no issues and I did a bulk restore of 100+ user apps from an i9000 Gb rom. I've run most of the i9000 based 2.3 roms and this stock so far has been the most stable and consistently smooth for me. I haven't bothered benchmarking anything yet and I bet Continuum with Talon 2.2 OC'd to 1.2GHz would beat this but as a daily driver rom this stock KF1 has been great so far. Way less features than all those awesome i9000 roms for sure, but that is what DG will bring to the table with Cog I am sure