I've been vaping for less than a week...love it. The only issue I have is a sore throat. I know to drink lots of water and have been for the most part. I bought some glycerine yesterday from a craft store and added it to my PG juice and it is wonderful. For all of you who started with a kit and some 100% PG juice, like I did, go buy some VG and add a bit. It may weaken the nic content but it definitely vapes better IMO. I know this info is all over the forum but I wanted to let everyone know the difference it made for my vaping experience.