I recently bought a Pax3 and I love it. It sounds fancy with the downloadable app and hidden games and all, but it has basic features too so you don't really need the app unless you want to fine tune your settings. The oven is on the bottom and is really easy to load/empty and holds 0.3g. That doesn't seem like a lot, especially if you roll 1g joints all the time, but it seems to last just as long and gets me the same result with less weed. As far as how fine to grind the weed, it doesn't seem to matter as long as it doesn't have a lot of huge chunks in it and you can pack the oven tight. Battery life is pretty good from what I've seen so far, I can use it quite a bit throughout the day and recharge it at night, sometimes a few days between charges. The price tag is a little higher than some but what appealed to me was the 10 year warranty it has. Most others that I saw only had a 2-3 year warranty but were cheaper. I opted to pay a little more for it because of that. It's also really portable and doesn't have a weird shape to carry around in my pocket (I take it to work with me all the time). I've read reviews on the oil adapter and probably wouldn't recommend it for concentrates but I haven't used it for that because I didn't get the adapter, and because I have a Yocan Evolve Plus XL for concentrates. I'm still getting used to the different flavor that vaping has but so far I love the Pax3. I know you already said you decided, but I figured I'd give another review to consider if you haven't actually purchased yet.