In regards to your second question. I think that most backup software is worth the money. Personally, I just use Macrium Reflect, which is a free product. The reason that these services can backup and/or restore faster than an installation is due to the fact that they're copying the contents of a drive and then placing those contents backup exactly as they were. There's no installation, no configuration, etc. By the way, 15 minutes is a best case scenario, I'm guessing you can only achieve that with a top of the line hardware setup inlcluding an SSD. Anyway, I recommend that you try out the beta of Acronis and a few other programs before committing. You may find that a free product works just fine.