I have researched these just a little in the last couple of days. It seems the Young Jung models are supposed to be a little better than the L Rider ones, like this. But, both get the job done. Don't use them with LR stuff unless you are not interested in high voltage vaping, because with 1.5 ohms they kick the voltage back down to 3.7 or so no matter what it's set on.
I ended up buying a L Rider one but only because it was $25, $27 shipped. I don't need the kit. Plus from the reviews it looked like it would do everything I would want it for. I don't care for the 1.5 dual coil stuff anyway.
Funny, I haven't bought anything new in over a year. Nothing no juice to atties, nothing. I stocked up when they were talking about banning them plus I got everything cheap by ordering in bulk. But now that I'm on this site and looking at all the new goodies I have a feeling I will be back in the spending mode again. Oh well I've already saved thousands and it's been over three years since I had an Analog.
Ps you can tell it's an L Rider because if you push both the + and - buttons at the same time it can lock the voltage in. The Young Jung doesn't do this. It does however, have a better seal on the top a slightly deeper well that also can take atties like the stardust. The L rider can check the exact voltage left in your battery. The Young Jung just gives bars for battery life, But it also will tell you the ohms of your carto/atty, L Rider does not let you check the attie's ohms. One more thing the L Rider often has a colored power button. The Young Jung does not.