It'd be nice if they told you the diameter of the battery. Then you'd know if it was a 510, 306 or L88B/J108. I'm told the 306 is best for flavor in the 510 world.
Their simplest starter kit is pricey as all hell. You can get a Fin kit that is similar, but only 1 carto, for at least half the price. I recently tried out the Fin and NexGen from local stores, and the Fin is much better in terms of draw and flavor.
Volt isn't bad. I have a Volt auto and the draw is noticeably tighter than my Echo. It's okay for home use, but I'm not sure if I could stand the tighter draw all day long.
If you're sold on the idea of a 510 auto stick, you may want to check out the J108 from Preferred Smoke. I'm still waiting on mine on the mail, but you get 2
batteries, 5 cartos, 10 cartridges, 2 atomizers and a PCC with free shipping for $40.00. So it's either going to be complete trash or the hidden gem of stick autos. I've heard good things about the J108, so I'm definitely hoping for the latter.