As a starter atty RM2 is difficult to beat. Easy to build on, does not leak as long as you don't open up the air hole to much or squonk to much. Loads of people use them, so lots of information on how to get the best out of them is available. They are not a high end atty, but they are effective. I have a couple of different top caps, one with a larger air hole for lower ohm builds when I want more vapour. One I use all day with a smaller air hole for a higher ohm build that I use most of the time. The higher ohm build gives me better battery life and enough vapour satisfy me.
juice consumption is also much lower with this build. I have learnt to be careful not to get sucked into the hype every time a new atty hits the market. Plenty of people want to part you with your hard earned cash, anything that is any good will get good
reviews from real end users that have handed over there own money. When you have played with the RM2 for a while you will probably have a much better idea of the type of atty you really want