Solid but not perfect

The Sentry noise gate works really well as part of the pedal board. Gating is tight and the configurability via software is just unbelievably flexible. But when plugged to my Boss Katana Mk2 100W effects loop the pedal has weird issue of emitting a high pitched sound just before the gate closes. It sounds almost like feedback and adds an annoying "zing" at the start of the gating. I've gone through this with Thomann support and even exchanged the unit once, but it seems this is some weird issue with the gate and amp not quite working together as expected. So works well as part of pedal board, but might have issues if plugged to effects loop of an amp (depending on the amp as I've seen YouTube videos where it works just fine in effects loop of some amps).