Update guys:
1. Customtronix are awesome to deal with and super fast shipping
2. the product itself is high quality fit and finish is the best i've seen for a product like this.
3. customer support is also very good.
4. as for the functionality itself, unfortunately the product is let down by the actual headunit.. the screen resolution just doesn't match up to anything that you may want to mirror especially since most devices are FHD.
to summarize the rax connect itself works as advertised and is easy to install and setup but the 8.4 screen isn't optimized for mirroring.
