It all depends upon what you want from them. They all burn pretty well, both herb and oil, but they generate heat via a nichrome coil which must directly touch the oil or herb, and gets too hot over too small an area, and ends up just charring your herb or 50/50 burning/vaping your oil. They are quite quick and convenient,s o if you dont mind hot metal taste and arent looking to vaporize, they are good. just get a generic direct drip ecig, its cheaper than brands like the trippystick or atmos etc, and all those branded vape pens are just cheap ecigs rebranded as vape pens anyway. If you want a good portable herb vape, I recommend a fritted glass disc and bowl, or vapor genie, or iolite whisper. None are pens or electric but they do actually vape and are still quite portable. For oil vaping on the go, I recommend a wand/concentrate bowl or fritted disc.
Check out the link in my sig for a full run down of all available types of vaporizer, portable and stationary.
