So I got my v5 in the mail this morning, ordered last week when one of my v4 replacements from fasttech had screws that gripped my coils so hard it was impossible to install them even when I lubricated them (literally threw it out the window and ordered a v5, still have 2 perfectly fine v4's). Blows my mind just how easy it is to install coils into posts that have holes in them.
I've got plenty of experience with wicking the v4 using rayon, and my v5 performs just as well which is great. Whats driving me nuts, is I haven't figured out a trick to filling this darn thing without some flooding. The last thing I tried was closing the afc, removing the top/oring, plugging the chimney with my finger, then filling it straight from the bottle (tried a syringe too, same results). But it ends up with juice flooding the air intakes. I turn it upsidedown and blow out the excess, and it performs just fine after that until the tank is empty just like my v4's.
I wish they still had a fill port on the bottom like the v4. Surely it wouldn't have hurt to have included it so that the user could choose to top or bottom fill. Regardless, the new post design is still worth it.