I’m not going to mention company names but my husband and nephew both work as installers. They’ve worked for a few companies over the years and each of them does some shady shit in one way or another. It’s sad that homeowners have to question the companies word but better than getting taken advantage of. Make sure you read the contract inside and out and ask 1000 questions if you need to before making a decision. Also, be sure that any promises they make verbally are in writing as well. Sounds like silly advice but I’ve heard too many stories where things were left out or worded differently than agreed upon. Feel free to pm me if you have other questions or want specific info.