Am probably late to the dance with my reply, but what the hell.  PigCig was my first e-cig purchase.  I spent a week doing research -- given that there are TONS of options out there, which is crazy-confusing for total novices -- but one of the most knowledgeable-seeming and sharp reviewers out there posted a video review of this product.  He gave great insight into the advantages of Ego-style big batteries over the (universally-recommended-for-beginners) KR808-D1 model, including i) far superior battery duration, and ii) big vape.  But what sets the PigCig apart from the other big batts:  you can use it w/ the numerous KR808-D1, LeCig's D1, and GreenCig cartomizers that are out there.  (As a bonus, LeCig's customer service has been truly stellar.)  Glad I went for this over a "training wheels" model  --  I recommend the same to you, esp if you're gunning for TH.  (I'm grooving on LeCig's Vapriot Strawberry, btw.)