I wouldn't even try to let an istick live in my pocket. That thing would be dead in a week. I have very little confidence in their durability. I have seen/heard of many problems with these units. Not catastrophic failures like the 20 and 50 but they just seem to stop working if abused. I have handled and used both (and many, many others) and in this price range, innokin wins the quality and durability battle hands down. Of course, time will tell with the CFIV as it is a brand new release but it appears by all outward appearances to be up to innokin's expected level of quality. It's the attention to detail that sorts out the cornfusion.
I stayed far away from the iSticks from day one , i have never been a bandwagon jumper type . I'm loyal like that , Eleaf has been getting killed all over "Reddit" and other forums for refusing to help customers who have had a problem and for their tendency to ALWAYS blame the end user for any issues whatsoever.
People are outraged lol, never seen that kind of hate for a company , it's really over the top. Phil Busardo recently said that Innokin and Eleaf are on completely opposite ends of the spectrum regarding quality, Innokin has it in spades and Eleaf doesn't have any , i wasn't surprised actually. That remark is in the comments section of his Coolfire 4 review.