I agree it should depend on personal needs/tendencies.
I don't know a great deal on this, although I did ask the dentist who worked on my son about them. His opinion was that he was not "a big fan" of them. His main concern, as I understood it, was the possibility that they would eventually erode/unadhere and allow bacteria to get underneath, making for an even greater risk of decay.
The other concern I would have is the suggestion that the synthetic estrogens in the material might have some long-term effect (and yes, I know they are virtually everywhere in our modern world, and considered bad news by many!) probably better than fillings(esp. mercury ones), but ideal? I don't know.
I would have to have compelling reason to allow it, such as a serious problem with decay/family history (and DH and I DO have a history of terrible teeth, but our kids seem to be more fortunate; don't know where they got their genes, lol! But then, our son has always spoken with what many have pegged as a northeastern accent (New Hampshire, Mass. are the 2 most common verdicts
and we are both 3rd or more generation Texans, he was born and raised for 8 yrs in Oregon, so I have no clue!!! One of his first words was "bird" (sounded like "buud"). "Horse" was "hehse". etc. Maybe he is a "lost Kennedy", lol!