Convenience Group installed 3M Safeguard S140 Security Window Film on a total of 7 relatively large windows with multiple panes (26 in total) in our house, with anchoring. While at times there seemed to be some difficulties in communication, overall we were quite happy with the work. They ultimately took an extra half day, but we didn't mind - prefer that the work be down well rather than quickly. Quality of the installation was top notch - film is barely noticeable, if at all.
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