I stopped smoking using the 88vape deluxe pen. Mostly using the 88vape liquids wich are a 70% pg mix the 50/50 should be fine aswell.
Apart for nicotine and flavourings, vegetable glycerine (VG) and propolyne glycol (PG) make up the bulk of eliquid. VG is thicker than PG so the higher the VG the thicker the eliquid will be and wick slower the higher VG liquids 70/30 VG/PG are more suited to direct to lung (DTL) devices , and 50/50 or higher PG content is good for mouth to lung (MTL) devices such as the 88vape and blu pens.
With MTL vaping you get less vapour and usually use a higher nicotine content liquid usually 12-18mg wich is good most stopping smoking as you draw the vapour into your moth first then inhale like smoking a cigarette.
DTL gives a lot more vapour so a lower nicotine content liquid is used usually no higher than 6mg