After someone tried to break into our house through our back door and literally destroyed the locks, we needed to change them right away. David from Denver Lock & Doors responded the same day we reached out and showed up right on time, was kind, respectful and very useful, his remarkable advice was to upgrade the entire security and install high quality Mul-T-Lock high-security locks on both front and back door and quoted a great price for the project. David was very reliable and showed us exactly the big differences between the locks, the raw materials they are made of and their really impressive high secured keys. David did an outstanding job and we already feel much safer, thank you so much for the time and efforts you invested in our home security.