Initially when we started, we were looking for a 3rd party product that can produce rich excel reports programmatically. Essential XlsIo from Syncfusion was one of the product that we evaluated. The product didn't let us down and I would definitely recommend this product since it was easy to use, good feature list and the sample provided was a good starting point. Syncfusion should come up with some good documentation and sample example code but the support team was excellent. Response and followup was great! Thank you Syncfusion for your hard work. Long way to go!!