I bought 8 regular 510 batteries before deciding to buy a mod.
After some research I bought a Protégé which is a nice mod if you do not mind tinkering with it constantly. Plus it was an early one that had the faulty tact switch so I had to buy the mechanical switch.
The mechanical switch is also faulty and despite everything I try still hits only some of the time. Not to mention I had to buy o-rings and ox guard to even get it to work occasionally.
Needless to say I was disappointed with mods and leery of buying another. Not being mechanical in ANY WAY (molecular biologist/chemist) I wanted something I could vape on without the constant adjusting.
During all this, I stumbled upon the GG forum and started reading. It was the best thing I could have done! I bought the GGTS and would just like to state that I have never had a misfire. If the vapor production goes down all I have to do is change the battery or clean the switch...easy even for me.
Once I buy a GG Slim, I am going to sell my Protégé or give it to a friend. (Note: There is yet a 3rd type of switch for my Protégé but they are sending me that one for free at least.)
Yes, the GG is more expensive but worth every dime. I am also wanting to spend more money so I can buy the iattys and the AFS.
Dripping and driving in Dallas/Fort Worth metroplex traffic is not conducive to a long life.