There is a trial version of it. Just look at the devs other apps.
I installed it yesterday to give it a go. Really nice clean interface, im liking it a lot.
Some benefits.
Simple interface, clean...Shows speed and time and shortcuts to some apps (I only use music, digital radio and spotify so this is perfect for me)
Installs as an App and you can start it from shortcut, once happy you can have it start automatically on boot as your default launcher.
Has in built screen dimming which works (All other auto dimmers have never worked for me)
3 different launcher themes, im using the one in the photo.
Easy to remove if not happy