Had the Titan RDTA for ages and tried a few different mods for it but really I feel the Titan V1.5 is the way to go. The grip is really comfortable compared to a standard more square mod. The adjustment/fire button is great looking and works well. You quickly get used to using volts not watts and the mod gives you a wattage when you fire anyway. It's very solid feeling and definitely a more "at home" mod imo.
Very simple to use and perfect for the larger Atomizers.