I only had a Fictionwise account. I can't say it went terribly smoothly, when I first got the code only 9 of 218 ebooks transferred over. 2 or 3 weeks later, I checked again (based on updated info I had read in
this thread), and found that almost all had transferred. I think perhaps 10 did not, but I haven't checked what they were as I had all of my other Fictionwise purchases already downloaded and backed up. I will eventually (before this year is up) take the time to replace all of the Fictionwise secure ereader titles I have with fresh ePubs from B&N.