I have been vaping with an Eluma (902) for 5 days. Up until today I have been very disappointed with it. I have been using the prefilled carts. Tonight I decided to give the PTB a shot... man oh man what a difference! This is the best this thing has vaped yet. Now I really am excited about my 510 coming. I got a feeling the 510 is gonna vape 10x better than the eluma.