One month analog free! Still using the same atty, batteries and cartridge from day one on my 510. I drip a couple of drips when necessary and don't bother with the poly-fill stuff. The only problem or nuisance I have is the atty comes apart at times when I pull the cart off. I just push it back together and all is well. I wonder how much longer this atty will last me. I've actually been using it for at least 5 weeks. This 510 has been a real bargain! I haven't ventured into the fruity and 100's of flavors of juice that are available as the US tobacco from dfwvapor has really satisfied all my needs. I haven't purchased any extra parts yet, and have only had to purchase an extra charger, usb passthrough and juice. I am a happy vaporerer