First of all, it sounds okay. Bit too noisey, delay time is too short, but overall - usable.
However, the screws are super cheap and soft - after a couple of times they become flat and it's almost impossible to change battery. For example it happened to my Cinders OD from the same series. Most of you are goind to use power adapter, but if you're looking for a battery-operated delay pedal, look somewhere else (or get better screws before it's too late).