Multi-purpose 1U. All effects are just the guitarist (compressor, tremolo, Univybe, wha-wha pedal, volume, whammy, chorus, flanger, phaser, delay, reverb, parametric equalizer bands 1,2,3 or 4, etc.).
Double comprehensive connectivity: effects type compressor, wha-wha, univybe volume, etc. can be applied before the preamp, as you would with a set of pedals. The effects of delay, modulation and reverb are inserted in the effects loop of your amp, ideal.
the best way to use the rack, in my opinion:
1: Guitar input to MPX, MPX G2 to send input amp, amp to send back MPX G2, MPX G2 main output loop back to amp.
Can connect a footswitch and an external expression pedal.

UTILIZATION

Edition of the general principle is relatively simple: a button type of effect parameters and edition by traveling through the menus. The manual is therefore ClaI but in terms of programming possibilities of the machine. Absolutely everything is editable: order effects routing, insertion point, MIDI CC assignment expression pedal, three mapping to assign different MIDI program numbers at the preset.
A small flaw: there is not to my knowledge of software for editing via PC.

SOUND QUALITY

Besides the analog preamp section I do not use all the other effects are worthy of the reputation Lexicon: accuracy, transparency.
The two models of wha-wha (Cry Baby and Vox) are excellent.

The sound quality is at the appointment.

OVERALL OPINION

I use the machine for 3 months and I have not toured the extensive range of programming. Of all multi-effects I used, there's no photo, is the most complete and most versatile. the enormous advantage of the dual connection is a real bonus, I no longer use the right pedal, which is impossible with any other rack if you use an effects loop.
I bought it second-hand and do it again this choice in a heartbeat.