I just got my Riva about a week ago, and I am very pleased with it. If your considering getting a upgrade from a regular 510 I would highly recommend it. I am a moderate vaper and one battery lasts me close to 24 hours. I just put one on the charger before I go to bed and can vape all day. I use both batteries one to drip, and one with CE2 r4 cartomizers. The overall design is good, comes in several colors, I got the pink version. Its not as easy to loose, but I do use a lariat. Classy made PV. Really at this point I don't have any complaints, the LED on the button is a little bright and would rather it be a white color instead of blue. If your a light or moderate vaper this is right up your ally.