Had Mark come out to repair a sliding window that had the spring pop out. He asked me to text him a few pictures of the damage and measure the window dimensions so he could get the right parts and avoid a second trip. He did clear it with me to start texting back and forth before he actually did, which I thought was just fine. He quoted me what it would cost to fix with or without parts.
He arrived exactly when he said he would, and was able to repair the window without parts, which ended up being about $90 (this was about a month ago, so I can't remember the exact cost. It was definitely under $100).
Wouldn't hesitate to call him again if I needed another repair.