[dsr_]

Think of it in the same terms as any other service you're contemplating: do you want to pay other people for proprietary stuff, or do you want to pay your own people to develop skills around open stuff?

cisco has an incentive to not look foolish, but they don't particularly care about any small or mid-size accounts. Your people have an incentive to care about your security and functionality. Weigh up the advantages and disadvantages and make your choice appropriately.