I just got my Series 3 herb cartridge after waiting 2 months, and I'm not a fan. The taste is poor, the vapor quality is poor, the bowl is too deep which makes emptying it a pain, and the light on the end shines green the entire time it's in use which is more conspicuous than the other cartridges which light white when in use. The oil cartridge has poor taste as well, though at least it vapes well enough. I'd expect better for the cost of the full unit. That's the main issue with the V2 S3, IMO. You get a relatively expensive battery section that gives you all of the bang for your buck (magnetic cartridges with data chips, magnetic charging), along with fairly cheap cartridges. It's like the battery is over-engineered while the cartridges are under-engineered. The oil cartridge seems to be the most solidly designed out of the three, but it still suffers from a "cheap disposable cartridge" design mentality when it comes to things like taste, and the plastic mouthpiece. The liquid cartridges seem fairly well designed at a glance, and work pretty well at their best, but don't do so well with thick juices and tend to end up leaking a lot. The herb cartridge just seems poor quality all around, IMO. I think if the cost of each cartridge was around $50, and the quality and performance reflected it, and the responsiveness of the company was better, then the V2 Pro S series would be a solid value proposition. I want something worth the price of an S7, but in the S3 form factor. Even keep the one button, one temperature limitation; the convenient size and shape, the coolness and functionality of the magnetic system, and the reliability of these theoretical $50 cartridges would make a theoretical $175 two-cartridge package worth it IMO. Right now, I think the cartridges just aren't good enough to justify the cost of the battery. As it stands, I'm not interested in the S7 either… This is because the price of each cartridge is modestly increased compared to its S3 equivalent, meaning most of the performance improvement should be coming from the battery section and the increased capacity of the cartridges. Although I'd hope that the S7 herb cartridge doesn't hold much more than the S3 does, as it already holds a lot. It should at least benefit from a wider bowl either way. Having now tried all three S3 cartridges, I can't recommend investing in the S3 platform as it is.