I saw a blog post once where he had a picture before he added in a blue crayfish which was a nice very heavily planted tank, then a picture of after he added it, and the water was so dirty you couldn't see past the glass because the crayfish had dug up all his plants and put a ton of his dirt substrate into the water. I would say if you want to try, don't expect it to work. There's also many a story where the crayfish is ok for several months then all of a sudden will go on a killing spree. So yeah, definitely be aware of what you are getting yourself into.
