In general I would say that David Weekley homes (in Texas) has a good reputation. David Weekley has been a big proponent in Texas of laws that really limit homeowner remedies and to require a cumbersome process for asserting claims against builders. Despite that, I will say that they usually build decent homes. Many, many, many years ago I owned a David Weekley home (bought used, not new) and had no problems with it.
All of that said, I don't know anything about who they have working for them in your area and so can't comment on your local office.
We are planning to have a house built on our land and I considered the David Weekley Build on Your Lot program. I didn't go with it as I didn't like most of their plans (most plans were designed for narrow subdivision lots and we are on an acre).