my dentist affered me the compatability tests that are mentioned in the thread at the link. i could not afford them and wasnt going to be delayed in getting the merc out, so i simply asked which material most people had the best luck with. he said diamondlite, so that is what i went with. i have not had any major problems with it. MH says to have them double cured, meaning put the light on them twice. i did not have this done because i saw this too late.
the problem this material has caused me is that it is rough and bacteria hides in it easier. i have to clean more often or it stinks. it is far from ideal, but far better than what i had. maybe in my next life i will know better than to ever get a tooth filled to begin with.