I think the pros and cons are fairly obvious. BYOD saves costs, lets employees use the devices they know and love, and opens up your network to a lot more options. On the other hand is lack of control. You lack control over security and the tools that employees use. In addition, there are privacy concerns when an employee is using their own phone and you need to find a balance between the desire to dictate how employees use phones and the fact that they are not owned by the company.