I agree on the open tips :/
If you got the Ni coil in the pack that is probably "V2" so enjoy

I checked one of mine that is not opened and it was all .25s and the other box was a .5 and .25's - The Ni coil is the newest, plus RBA that has came along. Start off letting it sit for about 5 minutes filled up then go to 40 for a few puffs then start cranking it up. Watch for spitting at very high wattage.
Yes the juice goes quick but I promise you can almost top fill this tank while driving (not that I recommend that), but it is very painless.