I would and I have. I've read both The Casual Vacancy (seriously underrated in my opinion, but that was to be expected given it was her first post-Potter book) and The Cuckoo's Calling (where she writes under the pseudonym Robert Galbraith) and both are firm favourites of mine. It all depends on what you like though. To me, JK Rowling knows how to spin a really compelling story with three dimensional characters, and this skill translates into her adult fiction.
I don't like the theam's of her books,they are too dark for me.... no matter how popular she is.I had a huge problem with her spinning such rubbish for children to read.
I don't believe in following the mass.
She seems to be a good writer. Not sure how it would transfer. I meant to read Casual Vacancy but haven't got to it yet. Would be interested to see how I liked it considering I did enjoy her Harry Potter series, but then, that was a long time ago!