I have been using OwnerRez for over a year and a half now and simply love it. It provides all the tools needed to manage my rental property. Setup and configuration is straight forward and includes a Setup Interview to make sure that you configure the minimum configuration to get things going. After you have configured the system they also include an import feature so that you can import all your information from excel to make the transition a breeze. You are able to modify an invoice on the fly before sending the quote to the guest to include additional line items like a Special Discount, change a charge, delete a line item, etc. You have complete control over the invoice and how it will be presented to the guest, absolutely fantastic. The system is rich in all the major features that a property owner could ask for like a large number of payment methods, legal agreement integration including guest online signing, email templates, triggers and tracking, listing site integration, travel insurance, property damage protection and a host of others. The owners/developers of this product actually do listen to their customers and are constantly enhancing the product. Their response time for questions is very quick and they have answered all my questions. I highly recommend this product.