I received my repaired (or replaced?) power unit back yesterday, after Joe had diagnosed it as being defective over the phone. He installed a new coil, after telling me to remove the original before shipping to him and to keep it as a spare. The original coil was mounted horizontally, and the new is angled as others have described.
After charging it overnight, I've only just started on my second bowl.
For the first bowl, I left it at the default settings, and tried it out at 1 (320*)and 2 (350*). What I can say so far, is that this thing puts out a more than satisfactory amount of vapor at 320, with nice low to mid-temp flavor., bringing out the Lemony terpenes in my Jesus OG. I would compare the flavor as being very close to 370* in my Herbalizer. At setting 2 (350), I found it to taste somewhat "toasty", though not in a bad way. I did feel I'd gotten what I wanted out of the bud, so I didn't try setting 3. That's just a personal preference, as I don't typically vape over 370 in my Herbalizer, which, as I said, is similar to 320 in the ESV.
If the battery holds enough charge to be my "take-along" vaporizer, I'll be pretty excited. Currently, I travel with an ecig and "Pure" brand oil cartridges. I love those, but I don't want to attempt to make my own oil, and my weed is free, aside from soil, ferts, etc. (yep, I'm in a legal State, both MMJ and recreational). This thing could save me as much as $160 per month, and I do kinda prefer the flavor of bud anyway.
Back to the initial bowl.....I used the factory stir top each time after 2-3 hits. The ABV was absolutely evenly cooked, with not one tiny bit darker than another. In summary, If my Herbalizer is a 5 in all categories, my ESV's first bowl was about 4 in vapor production, 3-4 in flavor (maybe it just needs a slight temp setting change), and 5 in evenness of cooking.
My second bowl is not producing as much vapor, which could be caused by a slightly different amount of ground bud. Also, the second load was of some bud that I'd left in a suitcase for about a month, so it was much dryer. In reality, I may have gotten just as medicated with less vapor, as evidenced by this crazy long post.
Comparing to my Firefly, my initial impression is that the ESV is going to take over as my at-home portable, for ease of use and battery life (I hope...but haven't tested the latter aspect fully yet). The Firefly does provide great taste, but as the FF's temp can't be controlled with any real accuracy, the ESV may even have it beat there.
It's a dirty job, but I must now return to my testing duties.