We researched multiple contractors on homestars and elsewhere, many of whom overcharge for what amounts to a high-profit margin item already. Michael's price was at the low end, and he has great reviews on homestars, so we went with him. And we are very glad that we did. He was very knowledgeable, and convinced us that we needed h-seals on both sides and bottom of the door. He also treated the inside of the glass door with a chemical shield (most places say you don't need this b/c the glass is already tempered, but it has nothing to do with strengthening the glass). Rather, the shield is vital to ensure the glass doesn't haze over time unless you are willing to clean it regularly with rain-x. Michael is a very nice man, and did an excellent job on the install, to ensure that the door fit perfectly plumb and snug. We plan to hire him again next year for another shower door install.