Red Panda Tensor

first of all, I love it.
I'll try to give a description of what this thing is: it's a tape maching that follows you everywhere, and you have some control of how it follows you. It can track you, repeating everthing you play, or it can record what you play (overdubbing or not) and play it back. The play back can be adjusted: you can set direction and speed, stretching and compressing (without affecting pitch), and change pitch. Add a little controlable randomness if you want with a dedicated control. Now, where it gets really interesting, is by using the footswitch or the expression pedal. With the first you have 4 different modes available (and use it to store presets, or to control the pedal footswitches if you want to spare them from stomping - don't forget this is a type of loop pedal, so there will be a lot of stomping), and with the expression pedal you can control any of the parameters and combine them if you wish.

The thing is: you have to know what you will use it for, and there is no obvious use to it. Otherwise, it wil create a mess, or an unusable effect. It is a wonderful pedal, opens up your creativity, but you'll have to be open for it.

I hate this standard pedal world-view of providing a couple of knobs and hiding extra functionality for midi controllers, shift buttons, hold three stomps and turn this to the right and that to the left etc — why not make it a little bigger, add a small screen and a couple of data-knobs? It wouldn't add too much to the price.
It has presets, but you can't deal with them without midi, it has at least two extra knobs you can't access other than in a web-based midi-editor. It's stereo, but on stereo-jacks, which are sadly not a standard nowadays, so you need some weird Y-wires.

Okay, I can complain endlessly, but let's stop here and finish it all with this: what it does with sound and its functionality is unexplainably amazing, really.

Or, perhaps I'll finish with the fact that I'm having difficult times convincing myself I don't need a second one for another instrument.

Bottom line: a unique and versatile pedal with rich sonic possibilities.

Usage
I don't use the pedal with guitars but rather with synths, samples, vocals etc. and works perfectly on all types of signals. You can get some very unique sounds on extreme settings. One of the best features in my opinion is the momentary looping switch, which lets you capture source signal into the rest of your effect chain without any unnecessary clicks etc.

The pedal might be a bit difficult to wrap your head around (esp. the NXT mode), but once you understand how it works, all of it is very intuitive.

The price is a bit higher, but it's well worth for the product.

The controls seem a bit weird at first but once you play with it for like 1 hour you will get the grasp of what is going on quite well.

Build quality is amazing and the finish on this is to die for. The buttons are very sturdy and the fact that there's a USB MIDI host built in which you can use to tempo sync or control the unit.

It's capabilities are really extraordinary. You can loop small "phrases", reverse them, create "glitches", different harmonies. The randomiser is one of its biggest strengths. It helps create interesting soundscapes for almost zero effort. As far as I know (haven't tried it yet) you can control most of those functionalities via USB MIDI, which means you can also sequence changes to those.

Pretty powerful unit, highly suggested if you want to create atmospheric / ambient music.