We are an international law firm with offices in 11 different US cities and deal with state tax issues in six different states. We switched from ADP to CORT (as it was called at the time) in 1997, and I have been the payroll supervisor since joining the firm in 2000. CORT/NuView payroll is the most versatile, flexible, and user-adaptable system I have ever used. You can customize the pay codes, deduction codes, etc through use of what they call computation definitions (or "comp defs" for short) to calculate your pay and deductions to fit your particular requirements - all w/o having to have customization specialists from the vendor do it for you. This is a tremendous savings in both time and money. Their spreadsheet function is also one of its most valuable tools, one that I use heavily. You can pull data on virtually every data field in your database as well as comp defs you have created (or even user-defined custom data fields) and then export that data directly into an Excel spreadsheet for further analysis. I gave customer support a five star rating only because there wasn't an option to give six stars. The individuals at CORT/NuView have been with the firm for years, have a thorough knowledge of their product and payroll principles and requirements, and are the most responsive support group of any software product I have ever dealt with. Any company contemplating adding this product and people to their payroll operations will not be disappointed. Once implemented, you will not want to ever consider changing to any other system.