You definately can't go wrong with empty cartos.... and no you can't get vape with a one to one comparison to the 510, but it does produce good vape none the less... and brings out the flavor of your favorite juice.
once you start empty you will never go back.... of course unless you like the juice that you get your carts from i guess it wouldn't hurt to get the pre-filled.....
I just like to know what I put in my cartos
oh and still no complaints with my HC cartos... even though I have been going through them real slowly since I top off like a mutha hehe