I have a DR Horton home. No problems at all, but as Bobby J says, we were at the house every single day during the build. If there is an issue, it's more with the process than the product. They are great at cranking out homes, but if there are issues, they want to drive past them and fix them after the closing which is bassakwards in my book. They leave no wiggle room in the schedule.
For example...the framer builds a wall or room passage that is bowed or isn't square. The sheet rock guys come right behind them followed by the painters. Now, you have a bad wall or passage that is completely finished. They don't want to get their schedules boogered up so they let it happen with the intention that it will be fixed after the fact witch, or course, results in all those skills having to come back out a second time. Plus, we all know how easy it would be to get them back out because you would, then, be dealing with their warranty group.
We did have problems with arches being twisted and passages between rooms not being square. We had to play hardball and tell them not to bother to show up at the closing unless they were fixed beforehand. We dropped by two days before closing. When we got out of the car, we could hear them tearing apart stuff in the house to fix.
Bottom line is they do make a good product, but you need to be involved. That's really not different from what you should do with any home except the process moves so friggin fast with them that skipping a day can result in headache!