I love what they do, it's so easy to use! The interface makes everything very simple for all users, whether you are an expert or not.
It has been instrumental when we have needed some assistance with our costing procedures. They also provide great support as well which really helps us out whenever there's any issue! Nothing at this time but if i had anything negative about them it would be their pricing structure. We're using KOST mainly because of its ease-of-use compared to other providers such as SAP BusinessObjects 360 Suite.