We hired Bak Brothers to install our windows and doors for our home renovation project. We had 23 Marvin Integrity windows, 1 Marvin sliding door, and 2 Menards prehung fiberglass entry doors. Throughout the whole process, Ben was responsive and punctual. I was very happy with the pace of the installs, the windows functioned very well after install, and the insulation appeared thorough. The doors were all installed very nicely as well. It's been several months, and a nice range of wet, dry, cold and hot, and all of the doors and windows still open and close freely. Our windows arrived on December 5, and the crew began installing on the 7th. Everything was complete by the 14th. The installers were very polite and worked efficiently. They pointed out one of the window frames that was imperfect/flawed and needed to be replaced by Marvin. The reinstall work wasn't inordinately expensive (although I was angry with Marvin over the fact that I had to absorb that cost). They were helpful in determining the proper height off the floor for the doors (since we didn't have a finished floor in yet). They also had to make adjustments to 5 or 6 of the rough openings, cut most of the sheathing for the openings, and had to completely build one additional rough opening. In a couple of cases, the work they had to do was more than just shimming in some wood -- they even rebuilt the header over the sliding door, which was a very sizeable span -- and in all cases I was extremely happy with their choices and execution. And the additional fees for the added labor were very reasonable -- the extra work resulted in 12% overage, or $580 on a $4650 contract. There was one bit of confusion regarding "wrapping" the windows. When we hired a siding crew, they had expectations of the amount of exterior wrapping that Bak would do, and I never got a clear sense from Ben that they would typically handle that. Ultimately the siders took care of it, but only because I didn't really know to ask Ben to handle it. One area of concern was that my house used Zip System sheathing and tape, and from my early discussions with Ben, it was clear they weren't familiar with it. I sent them a lot of info and videos (from Huber Engineered Woods) but I don't know if they reviewed that info. I looked like they did the window flashing (with the Zip tape I provided) correct, but since I wasn't able to monitor the work, I don't really know. But they did seem fully confident the whole time, which was a positive. And they absorbed the cost of the specialized Zip System materials where needed (I already had most of what they needed) when they could have justified passing those costs onto me. The price for the work was highly competitive, and ultimately we feel it was a very good deal for the quality of work we received. A side note: we asked them to also bid on building the porches we had in our plans for the house. Unfortunately their bid for that work came in surprisingly high -- almost triple what other carpenters were bidding. It was very unexpected, so we did not hire them for that work. We assumed it wasn't a good fit for them, or the timing was bad, and that was why the bid was so high. But given the way the window and doors went, we would gladly hire them for any work if the bid was within our budget.