The instructions are vague at best. Watch You tube videos out there for installation tips. You get plenty of the water proofing fabric to get the job done, and a fair amount of adjustment for fine tuning the drain location. It is easy to cut to fit, but it is not very resilient until you have mortar and tiles placed. DO NOT drop your trowel on to or it will punch right through the fabric and dent the pan, but that's on me not Vevor.