I had 5 double glazed windows installed. Paul visited my house and did a quick survey for the quote. During the visit he answered all my questions and advised where necessary, at no stage did he try to "sell" anything, he just measured, advised and left, it was all done in about 30 minutes. His quote was roughly in line with 2 previous quotes I had received so the only decision I needed to make was which one? Paul won the contract for the following reasons: 1. As described in the first paragraph 2. Paul came across as a very personable person, easy to talk to, very polite and not all "pushy". All the work was done very efficiently and completed in two days. While he was in my home he was polite, quiet and just got on with the job in a very professional manner. The work was done to a very high standard and the work area was always cleaned up after each stage. I am very pleased with my new windows and as a result I have invited him back price up replacement French doors and a back door. I can happily recommend Zen windows and I feel confident you will be pleased with any work they do.