Ease of use and the pricing. They also simplify distributing your podcast to various services (e.g.itunes, Google podcast, etc.)

My favorite thing about blubrry is that it provides all the tools you could need for a podcast in one spot. It allows you to upload a podcast, edit the podcast, and even see the results/stats of the podcast all while connecting to other podcast platforms.

I like that Bluberry is easy to use and has some customization options (color, share button, etc). The price is also nice since it's free and many other podcast programs require a reoccuring charge. It's easy that it's not a separate account you have to set up, and you can simply acquire an account and podcast embed option on your Wordpress website.