I like that they offer multiple options to choose from depending upon your needs so there is always something out of my budget range but it's not completely useless because you can still get some value with what’s offered in their price point plan! Honestly email append has never been used when dealing directly w/ them or have only dealt indirectly via an agency who submits emails which we then send our list back over once received by customers & clients - thus giving us more work as opposed (or less) than needed without much benefit since all information was sent before anyways even if just "numbers".