I have a Chinese tech 2 and CANDi module. It has done well for me as a diagnostic tool on my 2009 LMM/Escalade ESV the "CadiMAX" (My Upfit Build Story on the frankenstein forum). I bought the subscription for $1400 and all I was able to do with it was to verify that the tech 2 had the latest firmware/software update. I was not able to get it to do any programming on my 2009 modules, so I requested a refund on the subscription.
Since then my tech 2 nolonger recognizes the CANDi module so I'm also looking at the idea of getting an MDI and just running Tech2software. Can anyone post a screenshot of how the newer MDI 2 looks when doing diagnostics via their laptop? (I'm hoping its a little more efficient than just a electronic version of the tech 2).