The ability of being able to copy-paste formulas from one sheet to another is great! It makes it so much easier for us as we can't have all our sheets linked together in just ONE spot. I wish that you could link your spreadsheet/document directly to the API but its not yet implemented that way. Having multiple companies share spreadsheets has been very efficient at times. We are able to keep track of things within several departments. Plus since everyone's information is already available, there is no need to print documents or send emails back and forth anymore.