Definitely kosher! Please do. If you clearly put in it that you received an advanced copy in exchange for an honest review, all should be well.
Just don’t mention any bungs you were given
(That’s a joke, Amazon!)
I will get on it in a few .... days? In the mean time, I'm befuddled. Any "bungs?" I know of bungs that refer to stoppers, and those that refer to holes, but I just can't help feeling (and I even Googled it!) that there is a joke there that is fling way, way, above my head.