I've been using Solo launcher on my Galaxy S5 for about a month and really like it. It's very fast and responsive, has plenty of customization options and free full laid out themes on the play store. I like it so much that I put it on my Galaxy tab 3 7.0 and Galaxy Note 10.1. Customizing each one just a little different to fit their various screen sizes and hardware capabilities. Love it on all devices so far!
Also it's continously supported, getting updates consistently making it even more responsive and quick.
Posted from my Monster Galaxy Note 10.1 via Android Central App