There is an SSPX chapel in Hungary that was closed for a while. At the same time, a Resistance chapel opened its doors. Both chapels had their schedules posted on my local Trad site. Last year, the Mass schedule for the Resistance chapel became unavailable. Meanwhile, services have been resumed in the SSPX chapel. I've found their schedule their official site, but for some reason, the local site does not post their schedule. I think the site has distanced itself from the SSPX for obvious reasons (It used to post schedules for Motarian chapels before the site decided to distance itself from the NO).
So, should I attend that SSPX chapel?
The Neo-SSPX is in a time of transition. Nowadays the SSPX Chapel in question will be identifiable as either Catholic or Marxist Modernist. Because we are Catholics, and not Jansenists, our Catholic sense is that through the use of our human reason assisted by grace we are fully able to make rational judgements and be adults who are morally responsible for our actions.
Therefore when there is a Marxist agenda at work in a Neo-SSPX Chapel we should be able to perceive this through the use of reason and avoid such Marxist Chapels. Because reason would indicate that the clergy in such Chapels are Marxist Modernists and the last thing such men would ever allow would be the distribution of legitimate Catholic sacraments anywhere under their tyrannical control. In particular, when the SSPX clergy act under the recognised authority of the Novus Ordo bishops, like in Argentina, then we should clearly understand that such clergy are in humble truth the Marxist emissaries of Satan.
As Our Lord has noted, the Devil does not cast out devils.
Where the clergy of the SSPX Chapel in question are still obedient Catholics in faith and morals, then we should avail ourselves of the still legitimate sacraments present there and be humbly grateful to do so. Where the Resistance is present they deserve our full-time support and we should wish the Catholics still in their nearby Neo-SSPX Chapels well, but fear for their souls.
We are in a time of transition and the normal Catholic use of human reason assisted by prayer and fasting is normally the best means we have to know how best to remain Roman Catholics in good standing. Then we will know which sacraments are legitimate Catholic sacraments and which are actually soul-killing Marxist bastard plagiaries.
The crucial thing is to avoid the temptation to fideist rationalist sedevacantist Jansenism and never become anti-social anti-Roman provincial sectarians or home-aloners. We must seek the Lord gladly wherever He may be found.