Aspose is great library. Prior to using Aspose we were leveraging a third party platform to perform file conversion on behalf of our customers. Due to security and compliance requirements we decided to bring this capability internally, however, this is not trivial task and Aspose solves some of the biggest pain points.

We needed a solution to convert Microsoft documents/sheet/presentations into PDf reliably and we tried OpenOffce and LibreOffice, which got us about 90% of the way there. Then we tried Aspose (Words, Sheet and Slides) and as per our initial testing it has been a great tool. It also supports streaming which is a huge plus and something that other solutions just couldn't do.

Overall we are happy and and plan to use this library for a number of our use cases.