Eh, that's debatable. The amount of fuck around required if you want to do it right - using proper filters to remove binders/fillers and such - is not worth it, in my opinion. I'd rather just shoot a larger amount of H.
Absolutely not worth it.
I'm in Australia which has traditionally had a good record when it comes to proper, high purity H, but recently I have got fucked up by stuff that obviously had something else in it. Not sure whether it was fent or nitazenes, but what I found (to my dismay) was that Suboxone does NOT work with whatever was in my "h". Best case I found that subs were ineffective compared to previous times, and worse case I was put into precipitated withdrawal which knocked me out worse than any WD I've previous been through is (which is dozens upon dozens).
It's quite a shock when you take 32mg subs and it knocks you on your fucking arse.... sweating, spinning, puking, shitting, etc like never before for close to 48 hours before it even lets up a little.