I am considering one, especially since RossTech are stating that for MY2016+ some features may only be available through Hex-Net which is a lot pricier.
My questions about the OBDEleven were:
1) Can you data log ignition values (timing advance etc.) and boost real time?
2) The accessible options are standard pre-defined ones or you can transfer info from VCDS guides and access stuff that are not originally there with coding?