Ice
Interesting as I have used both Ice Liquid Clay Bar and Polish and was disappointed. There's no comparison in my opinion to traditional mild clay as long as you us lots of detailer to lubricate to avoid any scratching. Yes it is more work but the results are worth it as it properly removes surface contaminents that a liquid product alone can not. As for the Ice Liquid Polish, it is very easy to use and gives noticeable results right away. But there is no durability to the shine - I've found it to fade fast. If you want a quick and very easy shine with real wax protection that has moderate durability, I recommend Black Magic Spray Wax. It is an aerosol wax. Sounds weird but give it a try and I am sure you'll get hooked like I did. You get the benefits of wax protection & shine while being super easy to apply, just wipe on, no need to buff and no white residue!
Good luck!