I clicked the link, and my browser popped up with a message saying, WOAH! Are you sure you wanna go there. Its a risky site IMO. It even said, site is untrusted.
I'm recommending the dabbler even tho this is the TET Revolution thread.
The dabbler is a good oil pen, from a trusted and reliable source. (VaporBros)
There's been a long discussion of whether or not the revolutions work with oil.
Bottom line, there are a lot of people out there that compare some oil pens that heat up the oil QUICK, and they get FAST big hits with close to zero wait time. Although a majority of companies with pens like this use materials that do not compare to the materials utilized in the Revolutions.
Thermovape is a VERY RELIABLE, Trustworthy company with materials of the HIGHEST grade.
The trade off is, Better materials, around 10 sec heat up time for Low Voltage Revolutions (3.7v) a bit faster for Standard Voltage Revolutions (6v) but lower battery life.
Its a matter of letting the oil soak into the ceramic wafer and seep into the heating chamber where all the good vapor is produced, and because of the materials used. The taste of your concentrates in a Revolution Dart Or window version is Simply KICKASS. One of the purest tastes I've had the pleasure of enjoying As opposed to using cheaper pens that sort of diffuse the taste for me.
Just my
EDIT** The only reason I recommend the dabbler is because Revolutions are VERY hard to find these days.
You gotta know someone who knows someone it seems.