We have been using Xlsio for last 3 years. Before buying syncfusion we evaluated many 3rd party products and worked with their support team during the evaluation period. Finally we chose Syncfusion Xlsio component. No other product came close to syncfusion. Users in our organization use MS office excel for their day to day task. The excels has macros, formulas, graphs, support creating/manipulating excel sheets on fly ,etc. Apart from XLSIO other advantage we found using Syncfusion.Calculate.Base api (which comes with the Sycnfusion back office) was when we had formulas which are in strings and needs to be parsed inorder to calculate the value. The driving factor in buying Syncfusion xlsio was that we needed to get away with office installation on servers and use xlsio api to develop applications that worked with the excel file in a very short time frame. The advantage of using xlsio api is that it is very easy to use , the support docs are well documented, the support staff is pretty quick in responding to issues. I would definetly recommend Syncfusion XlsIO to anyone that needs to use Excel or build applications around excel in their organization.

We're using the Syncfusion XlsIO in our trading system for external reporting (in excel) and for a lot of other internal document handling (special excel files) since 2009. In this year we have adapt the most of our modules to the new version 8. The benefit of using the XlsIO is that we're completly independend of the local installed excel version. We are handle complex excel sheets with a high amount of data. If we have problems the Syncfusion support needs mostly one or two days to identify and if it's required to fix issues. Requests for implementing new functionality are always welcome and mostly in the next or in the next but one major release available.

I needed a solution that allowed me to customize Excel files for my startup, a company that sells a Microsoft Excel training tutorial (picture a book written in Excel with interactive exercises). Each file needed to be processed specifically for each user, embedding their information, and then locking it. I spent a lot of time researching all of the options and Syncfusion was the only that was able to handle the complexity of my document (it uses lots of settings, functions, and formats). We ran into a few problems on the way and Synfusion support was super quick to help debug what was going on. I highly recommend Essential XlsIO.

I have been using XlsIO for several years now. We had a need to create complex spreadsheets on the fly to deliver information to clients and found that it fitted the job perfectly. We now use it extensively in all our products where there is a need to create excel reports - this includes both web and desktop applications. I have found the technical support (when needed) to be helpful.