The ECO mod is simplicity itself and performs great. It's ultra lightweight, easy and to hold and operate and so cheap that you don't even care banging it around. I tried it with several different atomizers, and found out it works best with resistances between 0.2 and 0.8-0.9Ohm. No issues whatsoever but you do have to be aware of battery life; carrying a second battery would always be a good idea with lower Ohm builds.
The Lion RDA was a surprise: very easy to build, although be aware thinner gauge coils would be somewhat difficult to fit in the posts. Airflow is great and very easy to control. It has a very open to barely rescrictive character, thus making it better for cloud-chasing, although the flavor is VERY good (another surprise). Shame it doesn't come with a squonk pin (it isn't even capable of working with one; bottom is closed), but I did try to make it leak as a dripper and couldn't. All in all, great performance for what it is.
Finally, I was very impressed with the packaging and wealth of included bits, for a kit at this pricepoint. I'd definitely look into Vapor Storm in the future; if they could read this, guys, please make an economical, regulated squonk mod in the future. If it's comparable to this in feature/price you will sell millions.
Great mod, easy to use, easy to wick, great for an RDA beginner. Make sure you use coils above 0.5 ohms if you want battery life, as putting out at 90W is quite a drain on any cell :)
What a suprise such a small mod and hit's hard anyone wanting a compact light weight 18650 mod needs to buy this one.