My favorite keyboard I no longer changes for 2 years, with SwiftKey it is possible to write a complete sentence by choosing the words proposed above the keyboard which greatly facilitates writing and also improves the speed. The themes are nice there are a dozen short, simplicity of use is nice and gives me much better than the basic keyboard from Samsung (the galaxy s3). Try it, not one day early because it's hard to do it but at least one week of use and you'll see the difference.