Two comments on Mortty vs. Winkeyer:
1) WKmini (the Winkeyer functional equivalent of Mortty) is only $59 - NOT $129
2) WKmini is galvanically isolated - Mortty is NOT
Mortty is a nice offering - flexible, functional, and economical. If it were galvanically isolated I would jump on it. But until it is I will will pay the extra bucks and get the security I need.