I suppose that I am the odd one out. Got the full treatment for my JKU. The Inside, outside, electronic rust protection and sound deadening. Sure you'll say I was stupid. But in my defense, I could not resist. The lady that sold me the extras was stunning.
Good strategy by the business. But to be honest I am glad I got the treatments.
My advice is to see if you can get the lot for a bargain. Most noticeable is the sound deadening. Some of my mates are amazed at how quiet my ride is.
As for paint protection, had it done on my wife's car some 13 years ago and it still looks great.