So we purchased this in March last year as a small business we had three users. It started off well as we had less than 50 invoices. Soon as we grew as a business to over 100 invoices we started seeing older invoices disappearing and blank invoices appearing with different invoice numbers. Then to top this off we had duplicates all over affecting all the reporting. Basically we had to resort back to an excel spreadsheet to find missing monies and to keep a track of payments. Its a shame, it had so much potential. Will be seeking a refund as this is not fit for purpose until they fix these issues - I would want anyone about buying it for multiple users. * Side note, all the support would ask me to do is clear my browsers cache all the time, something at this level you should not have to do. Imagine loading facebook or amazon's website and everytime having to refresh and delete your cache. (99 problems.....)