I stay at the Hydro whenever I go to Pitlochry, it's clean and comfortable, can be a bit warm at night, and some of the paint work looks a little tired in the bathrooms, but it's safe and the staff are excellent. I would recommend it to anyone.
If they could put some lighting on the pathway/steps leading up and down to the street that would be great though. Phone torches are needed for that on dark nights.