Birds eye 360 camera systems

[davelondon]

I've just bought an HGV and I'll be converting it into a motorhome over the next year or so. I'd like to add a 360 degree birds eye camera system, but I'd having trouble finding any reviews of unbiased information. There seems to be lots of very cheap systems direct from China, and lots of obviously rebranded systems from UK vendors.

Which is the best? Are any of these systems significantly better than the rest?