I just had some great results after re-amping in Guitar Tracks with my V-Studio 20.  Only thing I noticed was a drop in volume in the re-amped track over the dry.
 
Perhaps I need to understand more, with help, the signal chain or the fine tuning of USB level, vs Input Sens level, vs Rec Level and I guess even the volume on my guitar.
 
Also, on a track, when I first start a project, the output is MASTER and I hear nothing until I switch output to VStudio20.  I that correct?  Is there a MASTER track in Guitar Track?  Using the version that came with V-Studio 20. 
 
This device is awesome.