I used exclusively Fram in the past (2001 and before), and have switched now (mostly) to filters on sale. I still use a Fram in my MX6 and the wife's Escort because it is the only filter I've found so far that has the clean-side ADBV.
I have had one Fram that looked like it allowed unfiltered oil through. That vehicle had moisture issues, I suspect from short trips. I have run other Fram OCODs for 10k miles and they came out looking great.
I have also run some Quaker State (re-badged Purolator Classics) for 5-10k miles. Again, most came out great, but I found a tear in the media from pleats being spaced too far. Another person noticed this in their filter, too.
The difference? I paid $2 for the QS filter, whereas the Fram would have been $5 (I get all the filters on sale anymore).
I guess what I'm trying to say is that there are many filters that may on occasion have problems. Unless I have a good reason to (e.g. clean-side ADBV), I'd rather roll the dice on $2 filter -- if I spend $2, I know what to expect. If I'm going to spend $5+, there are filter choices out there that are much less likely to fail (P1 on sale, for instance).
YMMV. These are just my opinions.