Chvrs

I have just ordered a Columbus 9.2" MIB 2.5 head unit and screen from fleabay. It is allegedly plug and play (according to the seller) though he mentions that there might be some sound issues which will require coding. Is this likely to be fibbing on the seller's part? Is any additional hardware required when upgrading from a MIB 2 Amundsen? Does anybody know if OBDEleven will be sufficient for the job? I have seen mention on here of tokens etc, are there usage limitations? The website states that the Ultimate unit come with 500 credits but there is nothing in the FAQ about what they are or how far they will get me. I am also considering VCDS HEX-V2 with a 3 VIN limitation. Anybody know what the best option is here?