Indow and its employees are great - prompt, knowledgeable and professional. More importantly, their product solved my problem. The goal was to reduce/eliminate 5 sources of noise entering through double pane, vinyl frame windows. The 5 noises are general traffic (65 mph freeway) and tires hitting the lane marker rumble strips, general train and whistle noise and wind hitting the windows. So far, I've placed acoustic grade (AG) inserts in three of the 5 offending windows and the noise reduction is substantial. When the inserts go in the other 2 windows, I expect the noise reduction will be profound. Indow has exceeded my expectations and I am 100% satisfied with their service and products. Thanks Indow!