First impressions after playing with it for about 45 minutes, just going through the effects and patches is that it's very easy to use to scroll through things and play with the noises. As with all multifx it's a session of "nice, nicer, hmm, nice, same as the last one, cool, WTF!" WTF is at the dusty end, there are some things from 70 to 75 that are just noise. I have no idea what they were on when they came up with those.
Where it scores over the MS60B is the ability to turn off effects in a patch, I can think of at least two songs we do that have different types in different sections, that although possible with the MS using the A-B-C function will be far easier with the three footswitches.
I now need to RTFM to learn how to program the user defined patches.
Overall, so far, very pleased with it. The pedal board will need some serious rejigging to make it fit though.