I've had a couple occasions to call support for plumbing products I've purchased from American Standard and for a large company they are surprisingly quick to actually speak to a real person in the U. S and seem to go out of their way to help resolve issues, send parts out with no cost and fulfill their promised solutions. A pleasant surprise.
Answer: Surprisingly easy, I, ve dealt with service at least 4-5 times. Phone calls get quicker response than email, they actually answer.
Answer: Absolutely legit, have used them numerous times with good results.