An Assessment and Fitting isn’t the end in itself. It’s a very, very sensible approach to buying a tool that needs to do a job.
There are any parts of an Iron that significantly impact on your ability to hit the golf ball where you want it to go. Getting that right with your own golf swing is difficult enough, so please don’t make it harder.
If there’s one resolution worth implementing in 2016, it’s only buying golf equipment after an assessment and a fitting.