BMW Diagnostic Cable/Software?

[bape0000]

Afternoon,

Having owned (and currently own) VW's and Audi's, I invested in a legitimate diagnostic cable by Ross Tech, to use with their VCDS software. I'm wondering if a similar cable is available for my 2008 E90?

I have seen these, but does anyone have any experience with them?

https://www.amazon.co.uk/Scanner-Airbag-Engine-Dia...

https://www.cable-shack.co.uk/products.php

Thoughts are welcome

[bape0000]

Lol yep Ross Tech was a hefty outlay. I've seen INPA and NCS mentioned. What do they do?