I ordered one of the NJoy kings when they were doing a promotion a while back (it was free but I had to pay shipping).
The form factor is good, very "cigalike", but they don't last nearly as long as they claim - "equivalent to two packs"... no way. And they are way over-priced. I wasn't gonna spend 7 or 8 dollars for something that lasts less than a day.
However, for a first-timer's introduction to vaping they're not a bad choice.