Renovations' got me running back and forth between Home hardware stores and I've got to say Lowes needs to open more locations!
The staff here are so much more knowledgeable and well trained in their respective departments and not as difficult to locate as the staff at Home Depot. The staff at Lowes are also much more personable and eager to give you a hand even when you don't need it. My numerous visits to this location has always been positive!
They are pretty flexible with return and exchange policies - as long as you come back with the credit card you used to make the purchase, you don't need to bring the original receipt.
They're open 6am till 10pm on weekdays, which is awesome for those working late. In terms of pricing, they seem to be generally cheaper than Home Depot, but they will price match and give you an additional 10% off if you find anything lower.
I'm now a fan of Lowes - the staff here makes the whole shopping experience efficient! Props to excellent management!