Philip Schaff was a master of the history of Christianity, with very few competitors. His command of the material is unsurpassed. If you want a full scope history with detail when it's necessary, if you can handle history that also explains the history of ideas (doctrine), then this set will serve you well. When I pick up Schaff, I can get lost in his compelling narrative for hours. I also appreciate hearing someone who wasn't from the 20th/21st century explain events from the past - he doesn't share our biases, which makes him refreshing.
This is the best book of Church History I ever read. I dreamed to have it when I was student. Now I was very thankful to God to see the discount and the good price. So I decided to buy it. I started to read it and I find it very good and useful. I recommend it to everybody who love Church history.