I really like chain vaping at this point. I've only been at it for just about 5 months and I started at 18mg with an e-go type. In the evening is when I vape most and I'm at 2mg. As Andria just pointed out, you can take a bit more in than you think and then it hits you. I get a bit wired from it at times. I'm moving down to 1.5mg when I mix again. I still will stay at 5mg during the day as I'll go an hour at a time between vaping so it works well. Just monitor what you're doing carefully and you'll figure it out quickly and make the adjustments needed. It's all part and parcel of being a vaper.