Hello all, I received my unit last week but was away on business so only just successfully installed the unit and drove around a little yesterday. I was fortunate enough to have been looking at this thread when the discount code was posted so another big thanks for that!
First, yes, the installation is non-trivial in the leaf since it is such a small vehicle, although any work in that area of any car is never fun or easy. I struggled for a little bit to see if I could install the device without removing the pedal but that was impossible so I removed the pedal with the aforementioned 10mm socket. Be aware that you will need a very small socket wrench or a box end wrench for the upper bolt as the brake pedal is right next to it. These do not require a great deal of force to remove. I can verify the electrical tape issue as well, I just cut it loose.
One warning I have is that you need to be quite careful when installing to make sure you slide the connectors together to align the pins into the slots. My initial attempt missed one and bent it to the side. Needless to say my leaf wasn't happy about it and I had to remove the device to confirm my suspicion that this was the cause. Fortunately it was easy to "fix" this pin with two small flat-head screw-drivers. For this reason, and the tape, I would recommend that the only way to install this would be to remove the pedal (unless you are unusually small and dexterous).
Driving experience so far has only been in the default mode 2. Definitely changed pedal response. The instantaneousness is gone. I'll change it to mode 1 today and check that out. My wife is a bit of a lead-foot so I can imagine she won't like mode 2 or 3. I'll update as needed.
Question for Marc: I thought the leaf device had modes 1-3 but I see people posting here about modes 4 & 5? Also there seem to have been a couple versions: "Smartpedal Prime and Smartpedal Advanced" and "5+1"? How do I know which one I have and how many modes? thanks