The best thing about redis is that it is very fast in execution as well as easy to use. I mean you don't need to write any code to make a connection so that makes life easier for me. I have not seen anything negative either. If you are looking for a simple tool to store data then this product will fit perfectly into your toolbox because of its ease of use. This is my go to solution when I need some quick storage space for my PHP scripts or something like that. I am using it for all sorts of things but mainly I use it for storing session data. The best thing about redis is that it's simple to use and easy to implement. It has good caching options as well. I have used redis in multiple projects and always found it useful. Nothing much to dislike about this product. If you are looking for a simple and reliable key value store then redis can be a good option to consider. We have implemented redis cache using in one of our project where we store user profile information.