Would you select any of these dental insurance plans?

I have a few mercury fillings in my mouth that I would like to removed and have them replaced with the non-mercury ones. I just typed in dental insurance in my area in google and clicked on this link. I have no clue on how dental insurances works so I will appreciate every input from my fellow flutherins. Getting the dental coverage from my job might be an option but let’s just say for this question it’s not an option. Or have you had this procedure done done before? Can you let me know how it went, what to expect or watch out for? Thanks!!!