I have been using WordPress for my blog since the end of August last year and I continue to be impressed with it. There is definitely no question of me switching back to my former blogging platform, Blosxom.
There are a few extra chores with WordPress, such as applying security updates and backing up the database. However, I find the time budget for such tasks is amply covered by what I save on the time costs of hand-crafting and publishing each post by FTP, which was the Blosxom approach. With all the other facilities I gain (such as the plugin which creates the “See Also” sections at the end of each individual post) I think the switch has been overwhelmingly positive.