After dropping my iPhone from the car, the speaker stopped working. Thankfully using this guide I was able to reseat the connector and all was good again. Make sure the four cable are attached properly to the board when reassembling as I had to take the protective covers back off again and reseat them.
Overall I feel confident that I would be able to do it again.
On a separate note I would highly recommend a decent precision set to carry out any repairs on these small devices. The screws are tiny and magnetised tools are a must.