I had checked out several companies, and David Costa was one of a few that got back to me. Of those who did contact me, the value for what I was paying was exceptional - not to mention the friendly/helpful customer service that David Costa provided through email and phone.
When Robert arrived for the job, he was on time and was very courteous. Because I have a two year old son, he started on his room first so that it didn't effect him later on for a nap.
When Robert was done he did a complete walk-through of the job site. I was impressed on how clean he left everything. I asked him about another job I was considering and he came back later in the week to do that as well.
When you watch HGTV you constantly hear of bad contractors. I've never done a testimonial before, but I felt like people who are looking for excellent, reliable workmanship need to contact Costa Caulking. I assure you, Robert and David are fantastic.
On a side note, having the caulking re-done has been great on our furnace - our house stays warm and the furnace doesn't come on as often.