Horrible experience. If you engage them, I would strongly advise against agreeing to pay before the job is 100% complete - their service drops off completely once they have been paid.

Admittedly my job was tricky with a single outdoor installation. The result was at least 6 visits to install, 2 rounds of damage, one of which required an insurance claim. Being a brand new house, we thought it was relatively straight forward to resolve the issues, but they denied causing the damage and took active steps to blame us for it. They left the site filthy afterwards. If you have doubts early, it doesn't get better.

Approximate cost: $2000