I attended Catholic schools my entire life and I can honestly say CMRI has never taught or said anything different than the Roman Catholic Church I was brought up in. I was born in 1940 so I had a taste of the True Church before being led into the novus ordo, and through the grace of God brought right back where I started from through CMRI, remnant of Roman Catholic church.
CMRI does not believe in refusing the sacraments, unless the priest knows without a doubt the person is not Catholic and never has been one. This is what I was taught prior to Vatican II as well.
The sermons from CMRI are exactly the same as what I was taught, including belief in BOD and BOB, just different persons (priests) giving them. As a child growing up in the Roman Catholic church, it was stressed we can not judge the soul of another person at death, as CMRI teaches. Which is why they do not judge at the Communion rail, just because a stranger comes to Mass.
Even prior to Vatican II, persons received Communion unworthy, this has always been an abuse, which is why in the Bible we are warned when we receive Our Lord, we will be judged according to the disposition of our soul.
All the other groups, traditional, have little defects within them that are foreign to the way I was taught in the Church. A good example from SSPX; it was unheard of to speak from the pulpit about bad deeds from the Holy Father, as SSPX believes he is, and yet they speak about him in such a way; and from the pulpit no less, they have no respect for the office he holds (according to their belief about him).
SSPV, refusing sacraments just because they do not know the person, or do not approve what Mass he has been attending, as if they are God themselves, judging souls of good willed people, and by whose authority, I would like to know.
CMRI is willing to face the facts about what is going on, and face the truth that Masons, Commies, and Protestants should not only be refused Communion but they also can not be popes. Therefore CMRI is not lukewarm which is the opposite of having a holy zeal for saving souls, the first mission of the Church of Christ. They are not afraid to tell it as it is. Tcat, if you want the Truth and think you can live with the Truth, talk to a CMRI priest.