Originally Posted by pixelogik
If I use one and don't like it. Can I uninstall and get it back to how it was?
Yep, no problem.
A launcher is just an app, no different than a browser.
Just as you may try Boat Browser, and set it as your default if you wish, you can keep the app and swap back the default or remove the app and Bob's your uncle, everything will be ok.
Sorry for the low-res picture, here's my homescreen with Nova on a One X type HTC.
I like my homescreens clean and I load favorite apps into folders in my dock.
The dock scrolls independently of the homescreens, pretty handy.
When you do another launcher you lose HTC widgets. I'm using 3D time and weather made by Droid27, free and excellent.