My only view is that 'all' the mods are way overpriced. If the Chinese stopped trying so hard to imitate a cigarette they could make them for just a few pounds or dollars.
Unfortunately, due to so many American PV's users being soooo concerned about appearance instead of performance, they will keep making devices that look like the real thing and perform quite poorly. Most American users deserve to pay for poor performing devices because their main priority is that the device be cheap and look like the real thing. The Chinese are only giving them what they want.