To me:
510 and 901 carts aren't worth the trouble for most flavors unless you actually like a really cutting thin vape with LOTS of Throat Hit (nice with some flavors I guess). They don't hold but a few 'vapeable' drops anyway unless you mod the heck out of them.
Bump up to a Mega 510 atty, or adapt to an 801 (my fave, and if you look around can find them for $5 each all day long), and the carts can be quite nice
The SLB 801 w/native cart is very underrated. vape on a cart for a good hour or more usually before it has to be topped again....decent vape/flavor/TH. It even rivals some of the best custom horizontal coil type cartomizers out there in my opinion.
510 and 901 carts aren't worth the trouble for most flavors unless you actually like a really cutting thin vape with LOTS of Throat Hit (nice with some flavors I guess). They don't hold but a few 'vapeable' drops anyway unless you mod the heck out of them.
Bump up to a Mega 510 atty, or adapt to an 801 (my fave, and if you look around can find them for $5 each all day long), and the carts can be quite nice