[gbcdoj]

Nope. Time and again I've hear Bps. Fellay, Williamson and de Malerais say the opposite. Sorry, but you're wrong.

Seems that there's some division in the Society then. I'm only going by what's on their official website, www.sspx.org:

However, regardless of the gravity of the sacrilege, the New Mass still remains a sacrilege, and it is still in itself sinful. Furthermore, it is never permitted to knowingly and willingly participate in an evil or sinful thing, even if it is only venially sinful. For the end does not justify the means. Consequently, although it is a good thing to want to assist at Mass and satisfy one’s Sunday obligation, it is never permitted to use a sinful means to do this. To assist at the New Mass, for a person who is aware of the objective sacrilege involved, is consequently at least a venial sin. It is opportunism. Consequently, it is not permissible for a traditional Catholic, who understands that the New Mass is insulting to Our Divine Savior, to assist at the New Mass, and this even if there is no danger of scandal to others or of the perversion of one’s own Faith (as in an older person, for example), and even if it is the only Mass available.

From here: http://www.sspx.org/Catholic_FAQs/catholic_faqs__traditional.htm#attendnovusordo.

The Indult Mass, therefore, is not for traditional Catholics.

From here: http://www.sspx.org/SSPX_FAQs/q10_indult.htm.

[narses]

Yeah, sorta like the NO Catholics claiming it is a sin to attend SSPX services, even though Rome says it fulfills the Sunday obligation and is NOT sinful.

[GirlShortstop]

However, regardless of the gravity of the sacrilege, the New Mass still remains a sacrilege, and it is still in itself sinful. Furthermore, it is never permitted to knowingly and willingly participate in an evil or sinful thing, even if it is only venially sinful. For the end does not justify the means. Consequently, although it is a good thing to want to assist at Mass and satisfy one's Sunday obligation, it is never permitted to use a sinful means to do this. To assist at the New Mass, for a person who is aware of the objective sacrilege involved, is consequently at least a venial sin. It is opportunism. Consequently, it is not permissible for a traditional Catholic, who understands that the New Mass is insulting to Our Divine Savior, to assist at the New Mass, and this even if there is no danger of scandal to others or of the perversion of one's own Faith (as in an older person, for example), and even if it is the only Mass available.  
linked above

I shake my head when I read the above and think about the "good Catholics" who'd be as happy as can be if one would just believe them when they whine:  SSPX isn't in schism!  Is this garbage the encyclical wanna-be reading material for the schizzies and their fellow travelers?  One might think that the father of lies must be beaming about his handiwork hung so proudly at ess-ess-pee-ex dot org.

  gbcdoj, I am grateful for the sunlight is the the best disinfectant approach.  :-)  Thank you for your posting as well as the following:

there is never a necessity to ordain Bishops contrary to the will of the Roman Pontiff, Head of the College of Bishops. This would, in fact, imply the possibility of "serving" the church by means of an attempt against its unity in an area connected with the very foundations of this unity. (Pontifical Council for the Interpretation of Legislative Texts, Annexe to Prot.N. 5233/96)

[ultima ratio]

The Novus Ordo IS a sacrilege. It ignores the Real Presence and Propitiatory sacrifice. It is an abomination that must be destroyed for the Church to be well again.