Dearest SweetSue - you are too extroverted to "go quiet" so please don't. Besides, you'll miss my stunning 36 page write up on how to use the Da Vinci portable vape. Which is coming soon. Not.
I can say, though, this thing is by far the best portable vape unit I've ever used - it actually works and it doesn't get too messy (even though it's a pain to load). I don't think it's possible to get a better one.
It holds enough for 3 people to hit for 30-45 minutes continually. If you want less, use the little glass jar that is supposed to hold oils as a spacer by pressing a little ground bud under it in the chamber and leave the empty glass jar in with the weed. This thing seems to work best when the chamber is full of ground and then compacted buds. The material needs to stay at the bottom of the chamber in contact with the sides and floor of the chamber. If you're not filling it all the way full (or using the spacer glass to make it full), it can float around in the chamber while you are drawing air over it and not heat enough. I have started using the pollen press to press about .3 g of ground weed, then kind of pinching it with my fingers into an oval shape instead of round and then putting it in the chamber along with the glass jar. Today, I've packed it as full as it will go of ground bud and am just turning it off and on as I need more. I turn it off before I take the final 2 hits so that by the time I take the last hit I want, it's starting to cool off, and I feel like it's not continuing to vape the unvaped bud while I'm not active.
The son spent hours reading reviews on the internet and tweaking the process LOL He liked to take a small hit or two as it was coming to temperature at around 220-280 degrees to get just a flavor hit - you really experience the taste of the plant there. Packed full and used with my water bong, it likes to be at 410. Packed 1/3 full and using the glass and toking on it directly, it likes to be at about 390. He liked to start a full bowl at 380-390 and turn the temp up by 10 degrees every 15 minutes until 410 to get the most impact out of the bowls.
Also, you can put ground bud in the bottom of the chamber and put kief in the glass jar on top of the bud in the chamber. This makes a very strong hit! (Don't use the little black lid for the jar - just the jar).
Compared to the Gpen Pro - this thing is 1000 times better. It has kept me from giving up on vaping. My son says it's as good or better than the Pax 2, which he said a friend of his had. The hit is not quite as satisfyingly large as a hit off a water bong, but it's sufficient enough vapor that you can see it - about 1/3 what you would produce off a draw from a new e-cig.
My son did some VERY thorough unit testing on this device. I had an ounce and half of cured buds when he got here. Those are now gone. He's really put this thing through its paces