TL;DR: Each of the stories here except for Dec the Holls is a free series starter in its own right. And Dec the Holls is totally not worth it.
I get totally turned off by coercion/ownership so I didn't purchase Alpha(for free) and didn't read it here either.
Bad Motherf*cker is an awesome story that I read before, see my review there.
Hammered is also good (and also free).
Dec the Holls, which is the only story in this box set that you can't get anywhere else, is a badly done novella that doesn't take the time to explore any of the characters or the relationship between them. The actual problems in their relationship are airily thrust aside in favor of yet another sex scene. Had it really been my first Jacinda Wilder story I would have missed out on their much more awesome books.