My wife dives double PST 95s, as do some of my female dive buddies.
For trim reasons, I have been warned off of doubling up my Faber LP95s, as apparently their weighting is too top heavy (IIRC). Never doubled them, so I can't say from experience.
I have tried my wife's PST 95s, and I find them to be too short for me, esp. on the surface. I can't sit down with them because when I sit the bottoms of the tanks don't rest on the ground - making them uncomfortable on the surface.
For the same reason, my wife can't handle my double E130s (the new PST replacement for the LP104s). They are too tall for her frame, so if she sits down with them they will push her forward.
Certainly the bands could be adjusted for this, but it would result in throwing the tanks off-balance on your back.
My wife is 5'4, and I am 6'3, so your mileage may vary.
Almost ALL of the tech divers I know dive either the PST104s or the PST E130s. I am not an experienced tech or doubles diver - so perhaps someone with more experience than I have can weigh in on the subject.
-david