Honestly they have some great stuff, but it's much better suited to certain mindsets of composers. Those who just want to use nice sounding samples to create something have a sea of interesting content to choose from with SFA. Realism however is kind of hit or miss, and you end up having to work against the library rather than with it - and that's the part that made me grow away from them.I responded with 50% shame and 50% pride, “I own almost everything they’ve released”.
that said, DJ mostly seems to be known/has strength in the no-rules hybrid type, so It's only natural that he'd find use for many SFA libraries.
things like UIST, tundra, inceni - scream DJ. He might be bitter about HZS still, but honestly he might grow to love the library, even if it's not "captain jack sparrows dick" it's got thick warm strings.*(phrasing?) I'd imagine hzs would be best used for larger than life/softer/inspirational tracks.
That said, SCS is still the single best library they've ever created - despite having many interesting releases and a few unexpected successes(BHT success was a total surprise)