My newbie experience thus far(7 5 gallon batches), using spring water on the recommendation of an all grain buddy, is that using the bottled spring water available at my local Kroger has thrown off the flavor of everything I've brewed. I've brewed extracts and haven't had a delicious beer, save a DIPA I brewed and it was not delicious, but pretty good. I'm fermenting a big IPA from my LHBS, brewed with distilled water throughout, and based on tasting a sample when I dry hopped it is by far the best thing I ever brewed.
There are of course many factors that could impact the aroma and flavor, but the one I sampled is sooo good.
I will have to experiment some to be sure, but given my latest results I'll never brew an extract recipe again with anything except neutral water.