Michal is excellent to work with. He is pretty straightforward. I shopped around a bit and found either heavy markups or people who didn’t do what they promised. Michal made the window shopping process very easy. He gave me excellent pricing and was able to schedule installation ahead of time upon my request. His guys came out on the schedule day and completed the installation for 10 windows within 6 hours. Other places asked for 2-3 days of install time. I would recommend custom exchange windows strongly