I do have the Cloupor DNA 30 watt box,its got its own zip code,you can set it down for about 5 or 10 minutes without touching it and the LED screen will just come on for no reason,also No "LOW BATTERY" message you just have to go by what is on the screen...I do not have the T5 or T6,so i can only go by what i read those two missed the mark,and now the T8.The 150 watt box mod from what i have read is coming up a little short,i personally don't vape anywhere near that range so the T8 is meeting "My"vaping needs just fine.I do feel for the others that the T8 is not performing as advertised please correct me if I'm wrong.