The only benefit is the warranty, and thank God we had it, and the builder was a stand-up guy. It turns out the sewer guy didn't connect the house line to the city line, he just left it lying in the sand, with the predictable results. So I snaked it twice, pumped it twice, had the city inspect the city sewers, and eventually called the sewer subcontractor myself. He refused to fix it, so the builder had to spring for another sewer guy come down there, rip open the street, and lay a new line- $5000. He is going after the sewer guy for the 5k, I will probably go after him for the two snakes, the two pumps I blew, the chlorox, and the boots, maybe the tolls- total about 1000.
But considering that we paid like what, an extra 16,000 at closing for a 5,000 job, we still lost out. Plus, we only found out about the problem afterwards, so I still had to go down there, cover the crap, and chlorox the heck out of everything. So don't buy new construction, if anything I would pick up something maybe a year or two old, from someone whose hurting after buying new construction.