Fixed fee saves you from some issues and throws you square into the middle of others.
Specifically, it means you now need a far more detailed requirements doc BEFORE you can start working (safely, anyway), and you need to manage changes much more carefully because they are coming directly out of your pocket.
Plus, as an hourly guy, I never cared when the customer wasted my time, e.g. with over-attended phone meetings that take unnecessarily long because everyone needs to have their say. It didn't matter, because I was paid for it.
Specifically, it means you now need a far more detailed requirements doc BEFORE you can start working (safely, anyway), and you need to manage changes much more carefully because they are coming directly out of your pocket.
Plus, as an hourly guy, I never cared when the customer wasted my time, e.g. with over-attended phone meetings that take unnecessarily long because everyone needs to have their say. It didn't matter, because I was paid for it.