The combinationof reverb and tremolo effects, as found in certain Fender amps, can be very appealing, so a pedal that combines the two makes sense for anyone who doesn't have access to an amp with those facilities and wants a compact pedal setup.
Strymon did it with Flint and now boutique manufacturer Mr Black has done it in a smaller pedal, albeit with far fewer parameter options.
The tremolo is typical smooth Fender Deluxe bias trem, from skittery to throbby, while the reverb does a good impression of a brightly voiced spring and goes wetter than a typical Fender amp and more towards the 6G15 territory of Dick Dale surf twangers.
Both together - which is what you get unless you roll back the Reverb knob or the Tremolo Intensity - it's a timeless combination. We'd have liked separate footswitches, but the pedalboard- friendly nature trumps that.
