Just broke out a HV semi 801 atty from ikenvape, I have never used an 801 before, I have always used 510 HV atty. My juice really tastes different, almost as if I'm vaping 2 different juices. I'm running the 801 on my 5v saber and the 510 on my glv 5v. Not sure if there is a break in period for the 801.