tDCS for depression (or, more exciting for me, other neuropsychiatric indications) has always been one of those things that seems both flaky and potentially promising. It will be interesting to see if data is positive and if/how the device will be used (in clinic like rTMS? At home like CES?) and if it will evolve into actual good practice (like ECT, rTMS, etc.) or more shady / weak evidence (like CES, possible VNS.)
Looks like they are doing a study and the FDA is considering clearing it for depression in the US.