I agree, it is an advanced product and I wouldn't use it on an eGo for just the reason you stated. I use them on my VV Gripper and the Provari becuase they both have built in ohm meters and protection against shorts so I won't ruin my PV. I can adjust the volts to them each time I put one on I check the ohms just to be sure it is still good to go, then I also use the chart above to dial it in range. But with an Ego you can't get a "true" output even with the VV.
With these, you always start low on the volts and slowly move up to your desired volts, this helps break it in slowly.