I've used bags off and on for years, but many other vapes as well, and I've found that filling bags encourages me to use more herb, on a consistent basis, vs. some other models. You might want to consider a vape like the CRZ, which can deliver vapor rich hits (vs. the more diluted vapor that any bag filler produces), and quite a few of 'em, even with a small bowl. It's not what you'd choose to use when you want to get really high in a hurry, but it's great for dosing. You usually find that you're satisfied after x number of small bowls and you just don't load another for a while. And the more you use it, the fewer the bowls you'll find yourself loading before you decide you're good for a while. A vape like this goes well with a bag filler or other big hitting vape, so you're not always using the model that encourages you to use more than you often really need.