To make sure there are no problems, I fully charged the 8830 before the upgrade.
I had the original A4.2.2.123 software on my phone, being upgraded to A4.2.2.196 version. I used the desktop software 4.3 version. Because Bell Mobility is my carrier, I did not delete the vendor.xml file.

The upgrade went very smoothly. While 3 quarter of the upgrade complete, it seemed that everything stalled, but if you are patient and do not touch your phone, it goes through without problems. The hole process takes about 30-35min.

The biggest improvement is the battery life. I can leave the phone open the hole weekend, while I use it only for emails and it still has one quarter of the bar unused for Monday morning calls. Really impressed, before I used to charge the phone every day.