We have used Curb Design as a subcontractor for the last 6 or 7 years. They are always on time, always professional, and their pricing is competitive.
We never have a worry about the work they do, or any interactions with our clients. David has been great at prioritizing projects, even when we haven't given them as much heads up as we should have.
We have been in the Landscape industry for 15 years, and I would without a doubt, say that Curb design is one of the Top 3 subcontractors I have ever had work for me.