Analysis
Getting the staff: - there are a lot more people trained in the various aspects of SAP. That doesn't mean that they are any good; in fact I've seen a lot of consultants that were less than satisfactory. However, I would accept that the odds of getting at least a few of the better people are higher.
Real-time: - the SAP system can be real-time for their own transactions, but it will still effectively use batch transfers when moving information to other systems. So not really the benefit that that they hope for there. As for anomalies, they will only be caught if the system is programmed to do so.
Flexibility: - (quietly snorts laughing). SAP is not the most flexible of systems unless you have been drinking the SAP kool-aid, in which case you will believe anything. As recent reports show, SAP licencing can also be horrendously expensive and support costs can get totally out of hand. As for scaling up and down; presumably that menas they will rely on the IBM datacentres; they will scale up but I've never yet seen them scale down.
Insights: - Remember the old saying "Garbage In, Garbage Out". This still applies in this case, and the "Business Insights" will only be of any benefit if they have the right people to identify the requirements, design the structure, apply the changes and analyse the output. I've seen some really good output information and I've also seen some stuff produced on a daily basis for years that no-one was ever able to understand.
The biggest issue is the outsourcing; I don't wish to sound as if I am putting the out sourced staff in India down, but in most cases they have limited expertise. They have a culture of moving on after a very short period of time (months rather than years) and never really gain the knowledge that would allow them to be as effective as they should be. Add to that, many of them seem to have gained their knowledge through training facilties that are not approved by SAP.
I don't use Nationwide; and I might think twice about doing so for at least a few years until they get the bugs out of their systems.
(For reference, I've used SAP over the last 5 years on several projects and undertaken a number of certs. It can be made to work, but that is entirely down to the quality of the implementation team.)