I liked my 30s from the first hit. Over the last almost 5 years I have gone from my original Ego with the screwon atomiser and little tip stuffed with cotton to the bigger cotton stuffed cartomisers, to the IC4 and 16 to a T-3 tank, and finally the IC30s. The T-3 was ok, but I was burning through atomisers every week or faster. The 30s was good on the Ego cells, but I finaly got a VTR, and now I like the 30s even more. There is a rare dry hit when the fluid level gets low, but nothing regular. I can generally run the tank until it's empty with no dry hits. I haven't tried building my own coils or dripping, as I am a traveling service tech and don't like the idea of dripping at 70 MPH on the highway, so a tank is the way to go for me. I like the VW feature as I don't have to worry about chaseing settings if I get a different rated coil. The coils are a bit pricy, I was going through 1 about every 2 weeks on the ego cells, but I have yet to change the one I am useing currently since I got the VTR 3 weeks ago. Still even at $3 each not bad for 2 weeks.
As far as top or bottom coil, I rarely hold it upright while in use, usually almost flat while resting my arm on the truck door.
The tank has no issues, doesn't leak, no cracks or crazing, and I am on my first one that is somewhere in the neighborhood of a year old and it has been dropped many times. I also used to carry it in my Jeans front pocket with the screwon batteries. I don't use fruity flavors, mostly coffee. 11mg 50/50 mix from the local store.