Screen specific it's brilliant, first used it in AU back in olden days. I used an alternative maccentric cleaner here in DE but have just recently returned to iKlear after seeing it on Amazon here. I do find it very effective, only needing small amounts really, so it lasts many many years.So you use this product and never had shiny keys? Every MacBook I have ever had developed this issue.
I hope it will work after the shine is on the keys. I will give it a go. Certainly looks different than the cleaners I have used. Thank you.
Caveat: I'm typing this on a 13 yr old MBP and the KB looks brand new and never had sheen. But it's not because of any cleaner but off course the material Apple used to use. Their site does allude to the product playing nice with modern coated screens but again, my use has been only with vintage screens that used to really endure heavy handed cleaning with no visible impact.
But yes, give it a go. It's fairly competitively priced and gets the job done, definitely a vote from me.