I like my EVO tank from Aspire, it is a very smallish kind of tank, however when you replace the glass tank with the replacement tank the little barrel tank that holds 5 mls. It becomes a beast with the .4 ohm coils in it it has become one of my favorite sub-ohm tanks along with several others that I have. This one stands out in so far as the fact you can now get the .4 or .5 ohm EVO coils that are made specifically for the EVO tank. You can of course use the coils in other Aspire tnks and a few other name brand tanks that are on the market today. I find for me at least the .4 ohm coils offer better flavor and more vapor, now if only they would make a .3 ohm coil I have used the TRiton .3 ohm coil it works but I don't get the same flavor to vapor ratio that I get with the .4 ohm coil. That is me, I'm not sayin that anyone or everyone else will have the same experience. If you are looking for a tank that has a couple options for tank and coils then this is the tank for y'all, the original tank has a 3 ml tank I believe it is so you can use either tank, you have your choice of coils you are good to go. these tanks are relatively inexpensive so get you one, if you don't care for it you could pay it forward or sell it to someone. However I think aftr your first hit on this tank you'll be like....WOWWW, why did I wait so long to try you? Thank you all for reading my review, it is much appreciated. Be well, stay safe, God bless, and....VAPE ON!