This is one amazing resource. When I was full-time at seminary (http://acts.twu.ca), we had a superb theological library. But for access to the Puritan classics a special trip was necessary to visit the Puritan collection at Regent College on the UBC campus. If I had had this Puritan Hard Drive, no such trips would have been needed.
Never before have ordinary pastors, teachers and students had access to such a wealth of rare sermons, classic theology and commentaries. This will blow your mind.