Fairly easy to find (can be seen from the A9, in the distance). Turn off left just after the Luncarty junction, on to a farm track. Bear left towards Pitlandie then left again towards Cramflat. There's a convenient space to park on the corner so you're not blocking the road!
The stone's just under 6 feet tall, with no visible markings on it. Oriented NNE-SSW.