I've used both regulated and unregulated (mech) mods for several years. I like both. But as time goes on, I find that I like to adjust my vape "on the fly". You can do that with a regulated mod by adjusting the wattage setting; you can't do that with a mech because it has a fixed power output. My mechs have been retired for a couple of years now.
The Pro's & Cons of Regulated vs Mechanical Mods:
Regulated Pro's:
The battery power to the atomizer is controlled (or regulated) to stay the same throughout the battery charge by a microchip, from a fully charged battery until it is discharged to the low voltage limit of the device.
The power can be adjusted to increase or decrease the voltage by the user, allowing the user to change their vaping experience.
Has built-in protective circuitry against atomizer short circuits, shorts in the 510 connector, or fire button; accidentally putting the battery in backwards; over discharging
the battery; accidentally pressing the fire button too long (auto cutoff timer); and over-heating of the processor.
Has built-in battery voltage and atomizer resistance meters to check battery voltage status and the ohm rating of the coil.
Regulated Cons:
Generally speaking, may not be as well made or as durable over time compared to a mech. Electrical components may fail over time or from physical abuse.
Unless it is a "high wattage" regulated mod, will not be able to fire a sub-ohm resistance coil (ie. first generation regulated mods). Most modern regulated mods today have enough power or wattage to fire a sub-ohm coil.
Mechanical Pro's:
Generally speaking, are made to be more durable and able to withstand some physical abuse. No electronic components to fail.
Mechs are able to fire sub-ohm coils because there is no protection circuitry or processor amp limits to prohibit it.
Many mechs are machined to be quite beautiful, nearly art pieces. Many are manufactured in a limited run, in limited quantities, and inscribed with the number on the mod. To see a few examples of these beautiful mechs, go to the very end of this blog.
Why do people choose a mech over regulated?
Mechanical Cons:
No protection circuitry. This is the big one for beginners. The new user must always be aware of the signs of a short circuit, which could cause the battery to vent into thermal runaway. The mod must have ventilation holes in case you experience a venting episode and which should prevent your mod from becoming an exploding pipe bomb.
No voltage regulation of the battery. As the battery drains from use, the vape quality will diminish.