I was very surprised how well built this is, it feels so good in your hand, solid no rattles the battery cover has super strong magnets. The screen works great and easy to read simple to understand. All my Atomiziers fit great and not to mention it looks great. The fire and lock buttons feel super solid and very clicky. Battery life is decent but I use a limitless Plus tank on it and run it at 125 W so I half a day battery life. If you Vape it at 45 to 60 W you can probably get all day out of it. I highly recommend this product.