Its not really ideal. The display doesnt update and wont show you the resistance until you actually fire the mod. Something like an MVP2 you can push a button on the display to show you the resistance without actually firing the mod, thats the only thing I still keep my MVP2 around for. My Vamo v7 you can hit the fire button real quick without firing it and it will show you too. But these SX chips dont update until its fired. Say you had a coil on it that was 1.5, you take your atty off and throw a .5 in it. Hit the button real quick to turn it on, and it will still say 1.5. Now hold it down and actually fire the mod, the display will update and show you the new reading. At least its regulated, so youve got short protection, but its kind of annoying having to actually fire it to read it. The IPV Mini is the same way since it uses the same chipset.