I've heard Vaporesso Gemini SS316 w/Pre-built Ceramic Coils is great on Flavor! I also heard the Uwell Crown Sub Ohm Tank w/Pre-built coils is awesome! Also heard the Kanger Subtank Mini was worth at least an honorable mention. Are there others that match or exceed flavor production! I heard the TFV4 guzzled waaay too much juice? Do you agree with the above, not agree? Please share your thoughts! Also, what would be the best coils to purchase as replacements, for flavor?