Whilst I did use Feedburner, I jumped ship as soon as I heard they were shutting off the API. The only thing that I used Feedburner was for the subscriber count, but I've now switched the URLs around on my blog and added a little IP based tracker that more or less gives me the count.

I don't know if I just didn't 'get' Feedburner, but the only appeal for me was the subscriber count, was there any other key features that your own RSS feed cant be modified to do?