I have been vaping for 4 weeks to the day, pack and a half to 2 pack a day of Newport. There is a ton of info out there about these devices. I started with the inferno starter kit, size of a small cigar and it works great for my needs driving the kids and so on. I have moved up to a torpedo variable voltage (VV) unit for home. I use it in morning when cravings are the worst, it is perfect. I have the 2 kits and some replacement parts, tips and attys or carto's and cannot forget the juice. I have kept track of all this to see how much I have spent, $275 is the amount for everything I have spent and I will not have to get anything for 3 weeks now. Then I will need to spend about $25 or so for some things. Point I am trying to make is that in NY where i live for the amount I smoked it cost me about $420 a month, vaping will cost about $50 unless I get crazy and want to mod.
Find what you think you will like and go for it, you will build a little collection in the beginning until you find what you love, but I am telling you that I have never been happier and I feel great! Best of luck to all of you!