You've been SAPped
In fact all of the various garbage about All in One, Business by Design etc. is just marketing guff. It's still the same product whatever they try to tell you. (I've had numerous consultancy firms try to tell me that its totally different; sorry, but if it walks like a duck, looks like a duck and quacks, then it is probably a member of the Anatidae family!)
The software itself is not that bad; it's the consultancy and fees that kill you. If you are a big company and have deep pockets, it make sense. If like us, you are a smaller company, it's not the most cost effective product out there - I've estimated ROI of around 8 - 10 years if all goes well.