Carolyn,
Clearly I need to weigh in on the chocolate debate.  I tried the Aero version of this chocolate bar when I studied abroad.  However, I think I had a mint variety.  I also found it odd.  I don't really remember whether it "melted" or not, but I did find the texture off putting.
However, I think every other chocolate bar I picked up in London was miles better than it American counterpart would be.  Even the grocery store brand chocolate bars were great.  So, um, don't give up hope?