This is my second time having Performance Natural Lighting to install a Sonatube. My first one was installed in a windowless bathroom 4 years ago and there have been zero issues with it since. This time, a walk-in closet. John does amazing work.....clearly an expert at installing these things. He is precise, clean, punctual, takes time to answer any questions, and is just a really nice, professional and respectable guy. His prices are the best around. I’m a do-it-youselfer and typically dread hiring contractors. It’s a nice change dealing with someone who does things right - and as scheduled. He obviously takes great pride in his work. Solatube is a great product....the change is dramatic, and the only guys you want installing them is Performance Natural Lighting.