Excellent & Very Flexible Multi-FX Board!
After using a Boss ME-10 for probably 20 years, I finally decided to upgrade, and this is a good one.
+1) After doing a ton of programming on the ME-10, with buttons, menus, and a data wheel, I now have a box with all the knobs laid out in front of me. If I ever need to tweak a sound, or come up with one from scratch, it's easier than ever; go to Manual, turn on the modules you want, set them to taste, and hit the WRITE button.
+2) Amp modeling section works great and provides a HUGE range of sounds; heavily weighted toward the rock/metal/distortion world, probably more than I will ever use, but it's great to have all those flavors available.
+3) All the other sections each provide a WIDE range of effects, with lots of variability so you can find exactly the sound you want. (3a Nice to have tremolo after all this time; 3b Besides the dedicated Delay module, 2 of the other modules also provide a basic delay, all usable at the same time, which is very handy to have)
+4) The on-board expression pedal is an excellent addition, after using the ME-10 where I had to buy and connect one externally.
+5) The FX connected to the control pedal are useful and fun; some I have not found a use for just yet, but give me time. Includes 8va up or down, FREEZE, and Wah, among others. When you're not using one of those, it functions as a volume pedal; excellent design!
+6) If you're using it where you don't want to string another AC adapter, it works on 6 AA batteries. Sweetwater/Boss informed me that battery life is about 7 hours with ordinary alkaline batteries, and my testing agrees. And since I use higher capacity rechargeable NiMH AA batteries, my battery life will probably be much better.
+7) The ability to switch to Manual and switch each of the FX individually is a HUGE PLUS.
+8) Built-in Tuner and Built-in 38 second looper; both are accessible with the onboard foot switches. ME-10 had a tuner, but I had to bend over or connect an external footswitch.
+9) INCREDIBLY REASONABLE PRICE. I recall my ME-10 costing almost double what this thing goes for.
-1) The expression pedal is a bit small, so depending on the size of your foot (and shoe or boot), it may take some getting used to. I'm managing...
I think that's the worst CON I can think of, for me. Several people have told me they think the (FILL IN THE BLANK) "sounds better", but I have a hard time believing that there could be that much difference between the SOUND QUALITY of the various multi FX boards (zoom, line6, digitech, etc); I would not hesitate to use this box in any setting, recording or live. For me the choice came down to flexibility, variety of sounds, and ease of navigation, both when programming, and when playing.