Best blog and best cms software there is in my opinion.
I wouldn't use anything else to make a website, as long as I have a choice (and I say that because I was forced to use wix in a "web design" class I took last semester - if you can even call what we did web design...).
For many years, "Wordpress" has been a swear word to me. I design/code websites from the ground up, so never been a fan of quick structuring or template based environments.
However, as more and more design companies are using web builders, I may have to bite the bullet for some clients who want a quick blog/social interaction website built.