I’ll let Mr. Vida explain, in his own words, why you should go and read his open letter:
Why listen to yet another open letter?
I helped build PlayBook. My team designed the PlayBook OS. We spent the better part of a year sequestered in secrecy working on what we believe to be a tablet OS experience at least as good as an iPad and, in many ways, better. We are immensely proud of our work there. We view the PlayBook OS as our baby. We want to see it succeed. We know the potential it has.
Seriously: go read the letter. It’s more personal, and richer in experience, than any of the analyst accounts of Heins, RIM, or the PlayBook. It’s also short, succinct, and well written. Read it.