Has anyone brewed with Deer Park spring water before? I have 5 gallon jugs delivered to my house monthly and have quite a few extra laying around. Would it be better to use distilled water?
You'll be fine brewing with Deer Park.
I have used Deer Park Spring water a lot and have made some good beers with it.
I use White House Artisian Springs water from the local source. Spring Water is great for brewing extracts to partial mash in my experiences up to this point. I think you'll like it. the flavor of the beer is noticably better to my tastes.