I am doing the home study right now. It is pretty in depth. I am pretty impressed with the quality of the training software for the 175. The online courses written by Compass are ok as well. I am getting close to being done with everything and have already spent more than 50 hours on it, and I probably have about 10-15 hours more to do. Now I am not the fastest of readers, and I have been typing out a study guide as I go... so that may be adding a bit of time to the course. Hope that helps.