Yes, they're very sweet. They'll eat whatever you feed...they're a great clean up crew
Just don't,don't get prawn...young prawn can often be mistaken for ghost shrimp. If it has a red line down it's back...it's a prawn. They grow quickly! Molting at least once every two weeks and they'll get huge claws and quickly attack your fish, no matter how well fed they are.
But ghosties are cute, if your fish won't eat them...get some!