I have all the Topside mods including the Dual Carbon but this is my favourite of them all. Really good build quality and very comfortable in the hand. Love the juice capacity of this mod and that there is a spare squonk bottle included. Unlike some side firing mech mods of this style there really doesn't feel to be much of a voltage drop and really don't see much difference between how this hits and my mechanical tube mods. Great price and service from Vaping 101, highly recommended.