All big building companies are the same I have found from feedback from friends and work mates.
They all have good and bad points but from personal expirence when building my house National Builders Group was the best out of everyone.

National Builders is a little expensive at the start but after you add up all the standard inclsuions everyone other compaines adds on they end up being the same price or even cheaper but you get more stuff and better quality products.

Most people who post things on these sites are negative for any company but we found National Builders to be great, they actually outsource the builders they dont actually build the house so as long as you get a good builder then you are right.

Hope this has helped mate.