"I could not get anyone to help me until I contacted Gas’s Guru. They worked with me and got my problem fixed and talk about a group of very nice people. If I ever have another problem, I promise you, they will be the first company I will call."

"Glass Gurus delivered exactly what I hoped for, and in a creative way. I have vertical casement windows at a rental property and the operators (cranks) on both sides broke when the windows were opened in heavy winds. The operators are no longer made, but Glass Gurus essentially figured out an onsite rebuild. Saved me a ton of money over putting in new windows--and the operators work! I highly recommend this professional, smart team, which communicated effectively with me from start to finish."

"Glass Guru did a great job!"

"The Glass Guru replaced five picture windows overlooking the lake. The tech. Was very knowledgeable, experienced and did very fine job, on time."

"Great business to deal with. Absolutely no issues. Very friendly. I would definitely recommend this company."

"We had to replace our living room big main glass, The Glass Guru O’Fallon done exceptional work for the time of consultation-place an order-schedule of the replacement-inspection to prep the replacement time-replacement itself!!! Well done 👍🏻 super satisfied and happy with their service and professionalism. From the lady in the office Suzanne until to the professional masters Kevin and Greg who replaced our unique position glass window, all of them were super knowledge and friendly. Definitely recommend The Glass Guru O’Fallon to you guys!"

"All of the folks that we have dealt with at Glass Guru of O'Fallon have been great. They really made our small project very easy to complete."

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"They saved me a bunch of money that I really wouldn’t have had to spend for the job they were able to do. They replaced a small window when other companies wanted to replace the entire atrium window. This company is legit and I’ll call them first before I call any other window company for a repair."

"We had a broken seal in our window, they fixed it good as new ."