So far I will have to say I do really like the Guru. I've had mine for almost 2 weeks and have used it everyday. When I get a vape, I take the whole process into my "judging" of a vape. For example, no matter how good a vape is: if it takes forever to get it, high shipping, the return process stinks, etc; then why get it? From what I gotten from start to finish, the Guru seems worth the process as I use the Guru everyday like I do the VaporCup (which is my favorite portable). The Bad: 1)not easy switching out bases, 2)broke a sensor on each base so far, 3)not easy putting the mouthpiece on with the newest rings (I got sent 2 different rings to try), 4)sometimes I have to hold the "heat up" button 2 times to get the dry herb chamber to heat on the latest heating chamber you sent (it will start heating, then quit but that might be due to have broke a sensor pin, it's only happen 3 times), 5)some herb did get through both mouthpieces, 6)get 4-5 dry herb chambers per full charge The Good: 1)great taste (in the top 3 for taste for portables in herbs, the best for concentrates), 2)great ceramic heater for concentrates (no waste or mess), 3)digging the mouthpiece, 4)don't always need to grind herbs (packed nugs in and worked great), 5)the 14mm glass adapter fits perfect, 6)water tool works awesome, 7)the packaging was different than others, 8)so far the bases work even though I have broke a sensor pin on each, 9)pass through charging, 10) can use at low temps (I like 340F), 11)I start getting clouds at 250F when it's heating When I say herb got through the mouthpiece, it was very little and nothing to get upset over. Almost every vape at some point herb gets through. Also, I put a few nugs in it and patted them down and it worked just as good as grinding them. I like the way it feels in my hand when vaping, very nice and sturdy but sleek feeling. I like that you can put other tanks and atomizers on it and use it as a box mod. I haven't use the e-juice atomizer yet but will when I'm done with my tincture I made with the Magical Butter. I dig the Guru alot and glad I bought it. For the price, the quick shipping, the quality of the vape, the features and how good it actually works; the Guru is a quality vape worth buying. It has become one of my everyday vapes. I also carry a messenger bag so it fits easy in it. It's big for "pocket" carry comfortably like a cell phone with a case but then again it is a "box mod" too and I don't know many folks with box mods who put them in their pockets (not saying people don't, just the ones I know don't). I get decent clouds at 340F and got big clouds at 375F. At around 250F I can see the mouthpiece start filling with vapor. Also, I think the 3 hr battery is if you just use it as a box mod (which is adjustable V) but I I got a bunch of pics of it on my IG and the reddit discussion have used my pictures as well. If anyone has any questions, I will try to answer them the best I can.