Hi lucisac and congratulations on your purchase of the Janty KISS Box Classic, good choice !
I believe the current versions do not have the safety cut off anymore as either people didn't like it or it gave problems in the beginning (can't remember which

, sorry !). This means it is important to take care not to have it on too long else you atomizer may burn out and die on you 8-o !
Also for the same reason, it's wise to disconnect the battery from the switch when carrying the e-cig in your pocket, as the switch may inadvertently be activated, with potentially the same result.
As far as flavours are concerned, I find that after having used the e-cig for about 7 months and trying out various different flavours, I prefer the
tobacco type flavours over the sweeter, fruity ones. This wasn't always the case though, in the beginning I enjoyed flavours like Apple and Cherry quite a bit, but now for some reason I seem to have gravitated more toward the tobacco-y flavours.
I like Janty's Ruyan nr 4 and Oriental flavours, but am looking forward to trying out their new Camel and Virginia flavours. On a side note; I
adore Sedansa's Turkish Blend

, yummmm !
HTH
Cheers,
Silver