I just got my Stardust and I gotta say these are the most awesome carto ever!!!!! I got the 2.1 - 2.4 ohm and I am vaping them on my Buzz Pro around 3.9 - 4.2 volt. My juice is 40/60 pg/vg and it is awesome. I do have a question though..... I would I be better off getting the 2.5 - 2.8 ? Just wondering before I order a supply of these. Thanx guys for offering such a awesome product!!!!!!!!!!!!!!!!!!!