Description on site could have been better. Even though it said it takes a 1/2 inch line, I can't replace the existing fixture without tearing out the wall and going back to the supply lines.

I would have liked to know that installation would be difficult unless the buyer is willing to spend as much for the supply lines as for the tub and shower filler itself.
When my plumber called the 800 number and was informed that the correct sized supply lines would be so expensive, he was dumbfounded at the quoted prices. The next day, he installed partially flexible copper supply lines and the turnoff valves which look even better than the pictures of the quoted items. And at a much lower price.
The tub and shower filler itself is a good looking and functional product, but Fixture Universe and Kingston Brass should be ashamed of the installation costs they require of the unsuspecting public.