well..I have a couple of different looping rigs (since I use loops extensively..)...I'll try to take some pics nd post them, but my schedule as it is it may be a few days.... first, the simplest is my fav: a Zvex Lo-Fi Junky Loop. I have two of these, and often use them in tandem...but one ALWAYS comes with me to any gig I do...just in case. Tho touted as noisy and lofi, with careful setting it has the warmest and most muical of tones of any of my loopers. It does have some pretty "severe" limiations, but I find those (like having a short loop time..something most my loopers have) to be both challenging and liberating; making me work more with the music rather than the pedal....Next would be a Line 6 DL4. I don't really use this...as opposed to the ZVEX, it has a very digital tone, and creates some rather annoying artifacts coupled with piezo pickups. In short I have been underwhelmed with this pedal since I got it.....it is portable, and makes a nice doorstop.....Next...Original Lexicon JamMan. Love this one! Has a custom chip from the device's developer, Bob Sellon, which allows for for stereo looping, mulitple parallel and series loops, indiv. or global loop fades in and outs, advanced midi mapping, advanced replace and copy techniques, toggling between loop and delay modes, reverse looping...lotsa cool stuff. and is simply the best looper I have found for Bass looping. Have had this one for something like 13 yrs now and it still holds up. Next...Gibson Echoplex EDP. Wonderful machine and full of options...but the converters simply do not sound all that good with bass. It stays in the studio where it is matched to software loopers like Mobius and Live. Finally, Akai Headrush E2. I really like this pedal. Sounds good; replace function is usable.... and as a bonus the tape dealy section is very cool (much better than the Line 6s emulation/modeling). it sits on my pedal board with a ZVEX Lo-Fi as my "go-to" loop setup. I have also used the RC20xl, which I simply did not carefor either in its' interface or sound quality, Digitech JamMan (good sound quality...maybe a little too good... and kinda nice to have a week and a half of loop time, but overall not very useful as a live performance tool... and am looking real hard at picking up a Lopperlative LP1.