Most of it is good, some of it is rubbish. Non-trads will not be able to tell the difference because they, more often than not, cannot tell travesty from truth and believe the heresies spewed from the second Vatican council as being authoritative.
Because it is goodness mixed with rubbish, you should probably avoid it altogether. I'd recommend getting the catechism of the council of Trent, if I even knew what was written in it besides what I see on the internet regarding God's nature. (At the same time, because it came from the council of Trent, I do believe you can trust it)