I much preferred Ikenvape cartos. I'd use SMOKtech if IKV were not available. I hated Boges; their polyfill was packed too tightly.
Ikenvape cartos were highly sought after, and often were out of stock. You could sign up for an e-mail alert when they came back into stock, and everyone who used IKV cartos would message all their friends, "Ikenvape cartos are in stock!". They'd all be gone within a few days time if you didn't jump.
Rumor had it that Ikenvape commissioned Boge to make his cartos to his higher specification standards: higher grade polyfill, higher grade
coils, larger laser-drilled holes, etc.
Anyone use IBTanked cartotanks?
(this image courtesy of @The Ocelot)