Hired to fix a leaking chimney. Gave an initial quote after taking a look around and offered to start work right away without scaffolding on just a ladder. While working, he found additional issues which he fixed. Despite having to do more work, he only upped the price a little. He also cleared our gutters and made some fixes wholly unrelated to the posted issue.
Although we are still dealing with some leakage at the moment.
Before the work was done, we were told that their fix was the least expensive option, and might not work out in the end. After still having the leak, we were offered a partial refund, or a 2nd visit to try and solve the leak. Though we suspect it's a more permanent problem with our chimney that will require a full rebuild.