Well, day 3 has gone well enough. Still no alerts or any odd behavours: MSE simply plays well with everything. I decided to preform a definition database upgrade: That took about 5 minutes to download. Nowhere near as long as the original database download, but still long considering the short time Avira took to do the same action. Well, in most cases, from my experience, you are only likely to run into older threats in the wild, while directed (spam, etc) attacks are more likely to be the zero-hour kind, I guess it is not too much of an issue.
Otherwise, nothing special to report.