I don't know. I've never used goodreads, but I've seen plenty of people port over their reviews from there. I don't think it's an exact replacement, but I like it. I post my thoughts and reviews on books and books I want to read, and comment on other people's thoughts and reviews, and TBRs. For me, that's perfect.

Occasionally, you will find that a book is missing from your Bookwyrm server; finally, this is your chance to show your quality! You can manually add it to the library yourself, for others to refer to.

Here's a guide to switching I found. I'd try it out on its own a bit first to see if it's for you.