One IO is easy to use, quick to implement, and has great support from one of the best companies in the industry! It's hard to find something I dislike about One IO - it does everything you need and more.
The only thing I wish was different would be that one of the modules didn't provide an option to have to user select their own folder path (I think this is called "Folder Path"). This is not a huge issue as we are able to easily solve this by creating our own custom module with the same functionality. We were able to do away with a lot of manual labor by automating the configuration management process.