I have been using Blogger for a while now (off and on). This time I have changed to hosting with them, but still using my own domain name, so as to make use of some of their new features.
There was a bit of an issue with the change over caused by the DNS changes and some caching going on somewhere, but hopefully now that some time has passed this has been resolved.
Also, similarly to previous occasions, where they have provided some level of upgrade to functionality it came at a cost in that I had to redo some of my content. It wasn't a major issue, and hopefully the new functionality is worth it.
I'm still to try a some more of their 'gadgets' so watch out for future changes.