I went through the first included wire pretty fast. I would recommend getting plenty of supply's.
I for one have made at least a dozen coils since getting my iAtty. For one reason or another there are plenty of reasons to make another one. Since the cost is really cheap, all the more reason to play.
my favorite today is a twisted 34 ga. no-wick coil w/wick on top, 2.6 ohm at 6.4 volts, vaping 100% VG. So far this has been my favorite.
Ive tried 3.7 volts 1.5 ohm single coil w/wick, 1.4, 1.8 at 3.7 volts and 6.4.
4 ohms at 6.4 and 7.4 volts.
The variables are endless, as long as you have supplies, and time to twist a coil.
interesting note: I find it much easier to see the wires with a white back ground when making a coil.
another note: be careful to get all of the resistance wire in the ceramic cup if possible.