We had Clarke install their waterproofing system in both unfinished and finished parts of our leaky basement. Their estimator was excellent in explaining the process and providing an estimate, and returned a couple of times as we made changes to the project. Their work crew arrived exactly when they said they would and the project took exactly as long as they said it would -a rare event with most contractors. And despite having to cut drywall and jackhammer concrete, they left the place clean and tidy when they were finished. We can't comment on whether the system works or not as yet, but dealing with the crew was definitely a pleasure.