I've had the service for more than a month. I haven't had any problems to speak of and the speed seems to be on par with the other hosted bes/mds services. Some of my colleagues have 7510's and the browsers retrieve data at about the same rate. My take on MyBlueberry's comments are that since they don't have a ton of customers, the bandwidth is pooled and they don't have backups or lag time. If you equate it to Cable vs DSL, it makes perfect sense. Ultimately, your performance will depend on the carrier. I'm on Verizon and although many back end features other carriers offer aren't available through Verizon, the coverage is excellent.