Those who are out and about in the traddy world may well know that to some lovers of the old rites in the UK I am (sometimes bitterly) disapproved of for my defence (ten or more years ago!) of the use of the 1962 missal (as opposed to that of any number of possible dates before this). My point, by the way, is not that the Holy Week (or other) reforms of Pius XII were necessarily an improvement on what went before (I don't think they were) or even that I would rather die than have a Confiteor before Communion (I can think of far more interesting things to die for) but that I believe that, simply, it is good for us to celebrate Mass cum Ecclesia, and the 1962 missal is, as the great Michael Davis asserted, very acceptable, and has the great virtue of being indisputably part of the Church's prayer as Church, now clearly acknowledged by the Holy Father. My comments box has been reinforced for the storm of protests.
But you might be interested to read of the formation of a new group who are bitterly opposed to anything but the most traditional of forms of the Roman Rite. This is the society of St Pius I. H/T The Cafeteria is Closed.