Finally I have received the RBA and I really like it. I think I will be ordering two more. So here are my first impressions:
1) Since the RBA came fully assembled with coil and cotton, I first vaped it out of the box. It was quite okay, but had some hint of weird taste. I assume this would have dissipated had I kept it and vaped some more. Really, just a a very faint weird taste. The other thing that I noticed is that the RBA is airier and noisier than the pre-made coil heads.
2) I didn't really care about the included coil, since I wanted to put my FT coils in and see how easy or difficult it is to build this thing. Pleasant surprise: this RBA is well thought out and is incredibly easy to coil and wick. I have tried to run this RBA dry, but I can't. It just keeps wicking perfectly with no gurgling (although it is slightly noisier than the pre-made heads, but not too bad)
3) The FT coils and cotton taste really great and I now have at least a two-year supply of coils to put in for just $3 total cost. I think that I may simply re-wick occasionally, but the coil will likely last a long time.
So all in all, this is the perfect addition to the eGrip and cannot recommed more highly. If you are on the fence, don't hesitate, you will be very happy with the purchase.