Also, look into a BUZZ about 100 bucks but worth it in the long run (or the lil sister if your tight on money, but the battery does not last long enough on it, they are working on a big brother which will be better) Anyway these are variable voltage mods which lets you be in control of how hard a hit you get,tons of vapor, great throat hit, and awesome flavor improvement of your juices (there are video reviews of them so you can see and get informed on both these units and any others you may have intrest in) the buzz is very durable, good battery life and everyone loves them..look up the post threads on them and you will see, you can buy adapters for it also so that you can basically try any regular atomizer (Low Resistance atty's not reccomended) and/or cartridge or cartomizer on it. There are more than the two I listed above the fist pack is one also and is one of the best but with a $200. price tag on it is not the best to reccomend to anyone that may have a tight budget as most of us nowdays do. I tried to name the lower cost ones. They are coming out with Variable Volt Mods now that also have juice feeders in them too,so you can just plug a little bottle of your choice juice in and be good to go for quite a while, adjust how strong hit you want it to be...and have huge plumes of vape all day which is way cool...it's like having the best of every e cigg/mod all put into one....do some research...don't just take a persons word on one thing...that way you can get the best for your money the first time, and not a bunch of trial and errors and I wish I had not or had of's and a empty wallet. There is tons of info out there which is overwhelming at times , but you will see certain ones that are continously talked over becaus at the moment they are one of the best... until something new and better comes around to take over popularity. Another last bit of advice is to get advice from those who have owned/used a lot of different things as they have more experiencce with how the different ones work and perform, and based on your preferences can tell you if you would actually like it or not. Hope some of this was helpful.