The original facebook app uses a lot of space from my phone. So I installed the Lite version of the app from Google play store.
Space - The app takes very less amount of space and saves my phone from running out of disk space.
Speed - The speed of the Facebook lite app is average and not very fast which gives an average browsing experience.
Interface - Interface is not at all user friendly like the original app and does not even enable users to tag friends in the comments. It has a lot of shortcomings. It does not show all comments to a post, you cannot manage your pages from the facebook app.
I had to finally uninstall the app because it was not giving a good user experience.
Wont suggest you to try it. Try only if u want to check your notifications and then use the website when free.