Yes I own one and my review is a little further down the page.
To begin it's not anything like my Volcano. But it did induce me to buy a Volcano. The oven holds .4 gram. You need to stir the oven (not simply turn it over), as you want maximum air flow through the product. So that's a little irritating but necessary to exhaust the entire oven. I stir every second or third hit depending on the temp.
You have three temp settings the high the setting the quicker you use the oven's contents. About the only negative is it's a different hitting technique. You can't just take huge lungfuls like you can with the Volcano bags. If you try you will get significant back pressure and think it doesn't work.
Because of the form factor (very small and discreet), the air flow is limited. So you must breathe in lightly but steadily. So it takes a little longer to get high but not much. The positive side of this is you don't get a lot of smell escaping as the oven heats. I sat in a movie theater and no one noticed and there were people next to me.
Over all I'd buy it again. It cleans easily I get about 5 to 6 good hits per oven (or more if I didn't hate the taste of vaped weed -- it tastes like beer!) so I change the oven out early all the time. Less finicky people will get more and those with larger lung volume less.
hth,
