Do it Do it Do it!!! I didn't do the whole 3 stage in the focus as I didn't really want to spend the time on it. I did however line the whole floor/hatch space with
stinger roadkill extreme and then added a layer of MLV (
https://acousticalsolutions.com/product/audioseal-sound-barrier/Mass Loaded Vynl) there is also some of
this stuff out there, which I had but didn't do because I was lazy and worried about fitting the carpet back nicely.
I have done a few cars at this point and so am sort of used to it, but the biggest tips I have are these:
1-Take your time removing trim pieces, and make sure you have removed all screws/wires etc... before you start tugging too hard- Get a kit like
this
2- that said, Ford makes pieces REALLY tough to pull sometimes when it's done for the first time, so if you double checked and it looks good, give it a tug!
3- Take out all seats, carpet etc.. that you feel okay taking out, the more stuff you can put down the better. Any open gaps means the noise will flow to those as they offer the least resistance
4- Wheel wells, the hatch/spare tire area, and doors are the most important areas. If you want to start little by little, do the doors first I think. Doing the whole floor is worth it though and the hatch area is super easy as there isn't really anything tricky to move out.
This website is touted as the end all for info on almost ANY car/truck forum online, it's worth reading:
https://www.sounddeadenershowdown.com/
Again, this is worth doing and doing right. It will take you a day, maybe two depending on your skill level and the amount of the car you decide to attack. Lots of guides on youtube on how to remove certain trim, but know that you might have to watch an unrelated video to see it done (ex: center console, might watch a shifter install video). Also, some of the products I listed aren't the cheapest. There are plenty of options, but some of the CLD tiles use a smelly cheap sticky butane product so read reviews before you purchase.
Good luck and post up the process, I didn't really do a thread when I did mine.