I use it for several months now. It was a OCCAZ when I bought so I prefer not to look too with more upscale models. In addition, I was not looking for a tool but its impeccable level functional and AC MP-BT1 keeps its promises:
- Play with headphones no longer need to hear the neighbors screaming
- Integrated multi-effects (it is certainly not high quality but it can have an overview before moving on the pedals and an amp)
- Preservation of the real tone of the piece despite the downturn
- Simplicity of the menus that make a manual is almost superfluous
- Convenient to carry around
- Super convenient USB connection to recharge using any pc / mac

Small flat:
- Little memory so few pieces
- Exhausted battery quickly (is it because mine was used extensively before I buy?)
- Navigation a little difficult with the dial (hard to rotate)
- On some tracks, it is difficult to remove completely the low

Despite everything, I do it again this election eyes closed because it is a wonderful working tool: with this gear, we can lend to all the hacks and have a real feeling of playing at the same time as the group. I used first on "My Darkest Hour" by Megadeth and with the right settings, I could not hear the bass of Dave Ellefson. Really a very good investment.