In short: I'm thrilled!
The device has reasonably handy dimensions. On the pictures it looks "cheap" and "plastic-like" than it is in reality. The plastic feels good, and the case makes a stable impression.
In order for the RP-55 runs, are either 6 AA batteries required (allegedly juice for 10 hours), or an AC adapter (not supplied). I suspect that you can use a generic power supply (9V / 300mA), may have not tried. On-off switch does not exist, rather, the unit turns on when an instrument is inserted on "Input".
In addition to the input connector, there is an output (headphones or amplifier) and a Control In connector (stomp).
Included is a 24-page manual in English, which explains in a nutshell the operation. My fears, the unit is more like a book with seven seals, have been dispelled on reading the instructions: Basically everything is explained what it takes to get started.
The operation itself is intuitive and logically - not "hermetically", as it is known, for example, by bicycle computers or external thermometers (where switches are overcrowded). After a few minutes you can put the manual aside. Here gathered a few facts:
* There are 80 (briefly described) presets, with 40 seats can assign custom setups.
* For these "Custom Presets" one uses a preset as a starting point and then change the following parameters (virtual amplifier) at will: Preset Level, Pickup / Wah, Compressor, Amp / Cabinet Modeling, EQ, Noise Gate, Chorus / Mod, Delay and Reverb.
* Presets are selected using the two footswitches.
* In addition, there is a bypass mode
* And a voting function (automatically muted)
* And a drum machine with 30 patterns, their speed and volume you can adjust
In my view, a classic plus-minus list is unnecessary because the device - especially because of the price - really can have only advantages. Of course I'm far away from professional users, but I think that it just is not a better starting material in the world to effect messing around and dipping!
The whole thing is as hereinbefore with a ukulele, thanks to RP-55 now that sounds like "a big one" ;-)
