I would say that FOCUS is pretty darn solid, having gone to a FOCUS National Conference this past January, going to school where a FOCUS team is present, and having interviewed for a staff position myself

. All staff members are required to make a profession of faith and take an oath of fidelity to the Magisterium and the Church.
Now, that being said (and since this is posted in the TC forum), if your definition of “solid” equals “traditional” the answer is slightly different. FOCUS is concerned with orthodox, but not necessarily traditional. Yes, you will find praise and worship in FOCUS. Yes, you will find FOCUS appreciating Novus Ordo. In fact, I think I actually asked this question during the interview weekend, regarding how FOCUS deals with the variety within the faith (the P&W, the Traditionalists, chant-lovers, charismatics, etc.). Their response (if I remember correctly) was pretty much “We’re concerned with orthodoxy. All of those have a place within the faith, and as long as they remain orthodox and faithful to the Church, we accept it.”
But the bottom line is: I will say that FOCUS is quite orthodox and “solid”, at least given my experience. If you’re interested in a staff position, I strongly recommend it (esp. if you’re a guy, since they need guys) - the only caveat is that their “recruiting” happens mainly in the winter/springtime. Hope that helps!