The problem is I regularly vape loose MTL at 20 Watts or single coil DL 0.40 ohm at 45 Watts on single 18650 mods, and this mod will not be able to achieve either.
I may well be in a minority, but if you take into account battery sag under load and power consumption of the circuitry you may find it cannot meet your requirements of 3.6 to 3.7 Volts. Don't forget that the full voltage of the battery never actually makes it to the 510 as there is ALWAYS voltage drop in mods like these, you may find that if you need 3.6 volts you will have to swap out the battery at 3.8 Volts for MTL or a higher voltage for DL (unless you use large, low ohm coils) as the mod will be unable to provide the power you need once the battery voltage drops to this level.
You can, of course use lower ohm builds to compensate for the absence of voltage boost circuitry, but, for example - if you use 28ga wire for MTL would you be happy using thicker lower resistance wires so the mod can provide the wattage you need for the entire battery charge as it wont be an identical vape even if the wattage is the same?
Personally I'm happy to build for the voltage limitations of the battery for mech mods, but when it comes to regulated devices I don't want to be breaking out the calculator or building to lower ohms to compensate for the inadequacies of the board.
IMO battery voltage only boards belong in pod mods that run dedicated stock coils where the ohms and max wattage ratings of the coils are tailored to the voltage capabilities of the board (for the first three quarters of the battery charge at least), once you add an RBA to the mix they no longer make as much sense. However, from a business outlook the manufacturers save 20p on each board by removing voltage boost circuitry and will stand to sell more coils when a newbie with no knowledge of Ohms Law tries out the RBA and comes to the conclusion that RBAs are shit because they aren't familiar with Ohms Law.
Sorry bud, but I detest this type of penny pinching cost cutting. I hope they are using the board from the Kylin AIO and not mentioning the voltage output was an oversight, but I'll avoid this one until I find out for sure if it has boost circuitry or not. If it doesn't I'll pass, even if Washington Vapes end up selling them for £10.