My experience in reverb pedals is very limited. My baseline for reverberation is the Accutronics reverb tank that my main combo amp has at home. Sometimes, I enhance the reverberation of the spring with an analog delay pedal (2-3 delays, 200ms, very low level).
The reason of purchasing a reverb pedal was to use with my new Fender Pro junior that has no reverb nor fx loop. A light setup to take with me at jazz jams. A light amp, a gig bag with the guitar and a few things to fit in the pocket like a strap, a cable, a patch cord, a clip tuner, and the smallest reverb pedal possible. It had to be small, light, work on battery and have low consumption. I chose the Prussian Blue.
It is small, it is very light (it is so light that when you put the battery you feel the difference), and has a consumption of 60mA, the lowest you can find for a digital pedal (Thomann needs to correct their description on that). It is nice, I wouldn’t call it a tank but it is solid, the buttons are a bit on the cheap side. I do not have any issues with the placement of the power input, i.e. an angled “Dunlop type” power connector and a patch cord with an angled relatively large HICON connector, fit fine both in horizontal direction.
Regarding the sound, I would call it a “Spring in a Hall/Room”. It has spring qualities, but they are placed in a “real” space. There is always a small pre-delay, something that a spring tank does not have. The reverb tails are somehow modulated, there is some kind of movement. Next to my compo amp with spring tank, it sounds similar but more customized in terms of volume, length and tone.
If you search for “natural” and subtle reverberation, I think it is a very good choice.
