i find it easier and more efficient to smoke crystals when compressed into hash,, i find it burns nicer and more evenly ,, especially when doing blades,,
if gonna smoke just crystals, i usually just top a bowl with some, as kinda turns to hash and without some bud in there your gonna blaze your screen,,
Like JasonX said,, i find i get higher when smoking chunk form than powder, but could be just the same reason, smoking more cause its compressed, getting bigger hits, seems to expand more in lungs when compressed,, but really either way gets you blasted right,,