Has anyone tried it?
Should work well it usually takes 4-8 sprays of normal strength to get full effect; at least for me.
As reddog mentioned, it should be great as it’s just like using 4 sprays of IO x1 or 2 sprays of IO x2 if I’m not mistaken. With IO x4 you’ll just need one spray to equal this dose instead of using four of IO x1 or 2 of IO x2 as mentioned. Other than that the formula should be the same, it’s just the strength that’s different that I know of.
One thing that is a bummer though is that for me being able to cover a lot of surface area with pheromones to increase diffusion in more than one area of the body is limited with something like IO x4 'cause you’ll require less sprays. And I feel like if being able to cover more skin with more product may cause a greater chance of diffusion by having more skin covered in product. Not sure if this is in fact true or whatever, but that’s just something I personally like to be able to do.
I agree with mikotorocks714 - I prefer to get the wider diffusion of more application points rather than the concentration of a single spray so limit mine 2x 
The trade off though is that if you’re doing a few products you could end up more smelly so it can be a question of whether more application points is more important than using less scent. e.g. 4xIO, 4xIS and 2xIG for me is 6 sprays where it could be limited to 3 if I went with stronger doses.
Definitely have to be careful with the Neroli bomb too, but good thing the Neroli scent dries down close to smelling like nothing. Also a good thing about socials is that you can get away with more sprays because you can apply some on your hair, which can help mask the strong Neroli bomb scent that comes with more than 3 applications. So what I like to do for example is spray some on my skin areas like neck and such, then do the rest on my hair to avoid stinking he, he. But yeah, I think 3 is a good number of sprays on skin as a limit.
Apply IO x4 across the base of the neck (collar bone area) while moving your hand from one side to the other. This will cover more area. I think I read that Steve has used x8 before in the social line products. I really think it will be fine. You Go Girl!
Actually, Instant Openness 4x (in grapefruit, of course) is on my list for my next order.