1. No specific Hardware need: No need for Mac OS X system for development ( works on both platforms Mac & Windows).
2. Code sharing across multiple platforms: Run the same code on other mobile platforms (BlackBerry Playbook and Android), desktops & web applications (browsers)
3. SAP Data Integration: Ease of integration with SAP backend & Web Services (or to other standard data sources)
4. Improvement Developer Productivity (Adobe Flex / ActionScript would be easier to learn for a Java developer than Objective C).
5. Design Time Integration: Eclipse based developer (Flash Builder) environment or developer tools can be integrated with SAP NetWeaver Developer Studio.
6. Low Training Cost, there are plenty of examples and development tutorials available for free to get started with Adobe Flex.
7. SAP NetWeaver GateWay Integration: https://community.wdf.sap.corp/sbs/groups/adobe-flex/blog/2011/09/02/flash-builder-and-sap-netweaver-gateway-integration
Cons:
1. Dependency on Flash Platform.
2. Licensing Cost of Software: Cost of Development tool, Adobe Flash Builder Premium license costs $699. (on single license purchase, there may be discounted price for bulk purchase)