The Ascent is the best portable vaporizer I have ever had, and I have many. M recent purchase is my 5th one. The internal batteries last very long, and after one full charge, depending on usage, you don’t need to charge it more than once per week. The glass pipes give it an outstanding smooth vape and make it super simple to clean. And compared to other vaporizers on the market, the price is excellent! I can really, really recommend this product.