From where I sit I saw one of the strengths of RIM turn against them - the BES server and all the administrative control it allows.
For many years I worked closely with the team that ran the blackberry infrastructure at my company. Whenever a new blackberry came out, users started asking for it. When I asked them about it, the answer could often be summarized as follows:
"Yes people want them, but that model has X. Our current version of X does not allow us to administratively disable X. On (date) we will be upgrading our BES servers and will be able to disable X, at that point we will allow people to use them here."
So all the users who got new devices found that they didn't do anything that the old ones didn't. They blamed this on RIM, even though the real culprit was in fact that the company was locking them down. But I've heard this from numerous people at work.
I still have my company issued BB though, because I don't want them and their remote wipe capability anywhere near my real smart phone. Apart from the keyboard though, there isn't anything special about it.