When I was a teenager, my father's then-wife converted to Mormonism after being evangelized by a contractor that my father had hired to do some work on his house. So I have seen and heard their proselytization techniques up close.
Like most people have said, Mormons are generally incredibly nice. Even the contractor (who didn't do a very good job; perhaps he was distracted by the idea of converting our family) was very nice. As far as I can tell, genuinely nice. But I noticed something: My father, who was often gone for weeks at a time for work, had asked the contractor and the Mormon missionaries who started to come by when his wife expressed an interest in their religion, to please refrain from bringing their religious discussions into his house (around me and his wife) when he is not there. I think he didn't want to come back from a trip and find his family "Mormonized" right under his nose, and with a bill for supposed work to pay to their proselytizer. A fair enough request, right? He is the head of the household, at the time I was under age, and something as important as conversion to a new religion should not be done in a sneaky fashion.
For some reason, the Mormons did not respect his wishes, despite having told him to his face that they would not come by anymore unless he was there. Instead, they waited until he was gone again, and then a few days later they would stop by. If his wife answered the door, they would come in as though her interest invalidated my father's request. If I answered the door, they would ask for her, and if she wasn't there they would try to come in anyway. When I reminded them that they are not supposed to be here, they would very nicely say "yeah, we won't come in; we just wanted to stop by and see how you guys are because you're part of our territory to cover for house-visits" (or whatever they call annoying people by dropping by unannounced to try to convert them). I'd tell them thanks for your visit, but please don't do it again. Then they'd do it again a little while later.
I told my father that they still occasionally came by, and he was clearly upset about it. He told me to just keep telling them to come back when he was there, which I did (and when he was there he would make them stay out on the front lawn...hahaha). Eventually this whole situation, wherein his wife adopted this religion through what he felt was deception and a lack of care on the part of the Mormons for the peace of our household, put a lot of stress on their marriage and they divorced (not just because of this, of course, but I know it didn't help at all). My father's ex-wife is no longer Mormon, and despite occasional threats of a lawsuit from the contractor who started all this (my father refused to pay him because he did a bad job, and took much longer to do than they had agreed upon, probably because he was busy converting my father's wife when he should have been working), as far as I know the Mormons have placed our family home on some sort of Mormon-hater blacklist (maybe they blame my father for his ex-wife's defection? I don't know; all I know is that they don't come around anymore, because no doubt they remember being left out on the lawn and getting yelled at and being told to never come back...it really got bad for a while there).
So whenever I hear about Mormons being so pro-family, I just have to laugh a little bit. Pro-Mormon family, sure, but if you're not Mormon apparently they feel less compelled to respect your family or your wishes. They certainly didn't seem to care about all the stress they caused in my father's marriage, that's for sure.
But still, they're nice people on the individual level.