Z, I find SOS FOs problematic. I generally go high pretty high w/FOs in CP generally - b/w .7 - .9 ppo, but your usage seems to be pretty low w/r/t ricing/seizing.
I hate the whole sos-ultra-extreme thing, always end up ordering in extreme (and the FO's often do not suit me, like FO's from any co. but are usually more expensive than other places in extreme concentration). The teeny sample packs are OK to sample w/in mp (are actually a good bargain for MP testers), but not big enough to use as testers in CP, for me.
But my very favorite scents from lotion are from them. EG, their regular sandalwood (they have a million) is extremely faint in CP - and as I said, I always buy the extreme concentration - but lovely in lotion. And their Jo Malone dupe of Lime, Basil Mandarin is spot on. It just seems so hit or miss.