This is a good little vape inasmuch as the batteries are external & can be replaced easily & cheaply. (The problem with most cheap vapes is the battery goes to shit sooner or later, usually sooner, and it can't be replaced except at the factory & that's more trouble than it's worth.)
No temp. control, but then you don't really need it. If you draw too fast you don't get any vapor. If you draw too slow it turns to smoke. You'll figure it out in less than a minute.
One thing I've learned with mine, and I only use it when I'm camping or hiking, is the flower needs to be ground as fine as you can and then only fill the little tray up about half way. 4 or 5 hits and its spent and you need to reload. I also use flower from last years or the year before's harvest, as it more dried out and vapes easier.
Best of all, it's made in the US, probably in some hippies shop, but at least it's not fucking China.
ETA: It's NOT a good vape to test early bud, unless you dry the living shit out of the bud first. (see above comments)