The only thing I'd change is the name :)

Overall the tool is user-friendly and intuitive. The articles in Spiff University have been helpful in walking me thru questions and figuring out issues I run across when playing with rules and calculations. I've found 30-minute demos for our end-users are more than adequate as they are able to maneuver around on their own very easily. Formula reading/writing in Spiff is also similar to Excel/R so one can quickly adapt.

From my experience I feel Spiff can handle just about any Comp Plan that is thrown at it. And I also think there are multiple ways in which problems can be solved thus adding to its flexibility for complex issues as they may arise. In some cases we have payout rules that do all of the math previously contained in Excel and other cases in which we decided to simply use a table for results and targets. We've had positive feedback from our end-users and have been able to add metrics as requested. Having a tool that Admins can build upon and create/modify rules and databases is exactly what we were looking for to be as self-sufficient as possible. We've already experienced a redesign to one of our plans this year and I was able to create new rules with new requirements while still retaining and including 1H results. Also, having been a part of both a partial and full implementation (at 2 different companies) I have nothing but high accolades for the Spiff teams I worked with in both instances!