Well, first I agree with Mith, it is different at each chapel and as long as we know we can get the true Mass and Sacraments from a priest that truly is a priest, and as long as the priest does not start preaching NO garbage, we go - provided a good Independent or Sede chapel is unavailable.
Because of what it is, It is the Mass that matters.
No Moto, no Diocesan anything and no Novus Ordo services and like Mith, I wouldn't know a good DL from a bad one so I personally would not attempt going to one.
Should it become necessary again as it was in the late 60's early 70s, stay home and read your Mass from your Missal best as you can, Send your Holy Angel to Mass, take your Spiritual Communion, pray extra prayers and do what needs to be done to keep the Lord's Day Holy. I certainly would hate to have to resort to this again, but God needs to see exactly where we stand if He is to provide us with a good priest for our spiritual needs.
I have to disagree here. The Arians had the Mass, but they didn't believe. People like Saint Hermenegild were martyred because they would not receive communion from a heretic. It's not -just- the Mass. Archbishop Lefevbre aptly said, it's the "Faith, the Faith, and the Faith."
I don't entirely disagree, but unlike the times of saint Hermenegild, thankfully we are free to refuse communion without fear of martyrdom - and we do refuse communion from the NO heretic traitors to Christ who mock His Holy Sacrifice and who are knowingly or unknowingly striving to bring God's wrath upon the world - with the NO we cannot participate nor do we want God to see us as being any part of that mockery of Calvary.
No, we seek the Mass because of what the Mass is, because it is that Holy Sacrifice which pleases and appeases God like nothing else on earth and because of all the graces and strength we can get from our participation at it. We *want* God to see that we strive to be a part of that.
At the same time, we must exercise prudence - which is why we avoid the NO completely because of what *it* is, and if the SSPX start preaching and teaching the NO modernistic filth and go the way of the NO traitors, then we do not want God to see us as being any part of that either.
Padre Pio said we can exist without the sun, but without the Mass we cannot survive. Fr. Altenbach
said the last Mass on earth signals the end of time.
We do need the Mass for the graces that come from it which help strengthen our faith, but if the SSPX cave, we will all need to be extra vigilant and extra watchful and be on the alert for another place to assist at Mass because it will be only a matter of time before they get swallowed up by the modernist machine. Let us hope and pray they never succumb to the NO.