I've been attending Christadelphian meetings since early childhood. They are my family, and although I do not prescribe to all their beliefs, I still go to the meetings now and then. At one time I gave the exhortations on Sundays to our Ecclesia, which would be considered a sermon in most Christian churches. I am quite familiar with their doctrine and as Dream suggested, I owe them for at least being such a monumental part of my personal journey.
I love them for the kind, gentle people they are. Even so, there are some who can be extremely judgmental, even refusing to take emblems (Communion) with some members. I've seen many a man excommunicated for their life choices, so they are indeed a no nonsense group.
The Ecclesia I sometimes attend are always asking me to speak on Sundays, but I decline knowing my heart just cannot teach something contrary to what I believe, and I would not dare disrespect one of them by teaching something contrary to what they believe.
They study the scriptures like its nobodies business, and they (Most) are in fact extremely well versed in biblical literature. They were founded by a gentleman by the name of John Thomas. He's written several books, but I've yet to read a single one. All in all they are isolated, but they welcome strangers, only they will not take the emblems with someone who has not been baptized into the church.
I've actually had the opportunity to perform two baptisms when heavily involved in their activities. This was truly a blessing for me at the time, and even still today. They are very big supporters of Israel as a nation, and many Ecclesias send money to displaced Jews, so they might be able to return to their homeland.
Great group of people, and although I have strayed from many of their beliefs, I will never forget the love and compassion they have shown me since I was just a wee child. They are family, and they will always be family no matter where I find myself on my journey.