It's a fix: 61 notes, its 510 + 20 drum kits, more than 100 accompaniment styles, 16-track sequencer, 49 effects, 64-voice polyphony, arranged (very well), cover feature (change the styles music can thus move from an array of jazz and rock to techno style or ethnic).
Connectors MIDI, USB, headphone and speaker.
Powerful speaker.
short, it lacks nothing and for that price ...

UTILIZATION

Comprehensive, one can construct his piece A to Z sequencer with 16 tracks.
Very easy to use. There are many convenient shortcut to live but it's still a fix. Only parts such as the effects are a little longer to set up (we must go through to select the effects you want that's why I put 9.
user programs and functions are very useful cover.
the manual is a little complicated at first but you learn quickly.

OVERALL OPINION

I use it for a year and I am not disappointed.
I love the sounds of the arrangement above the low that I torture with all most unbelievable effects.
The price / quality ratio is much more than many (about € 400 or even € 350) for arranging this level that a bargain.
It is perfect for beginners in music because of its full autonomy, while some are needed to sample where computer to even play a sound that while that can create an entire song.
It does crrespond more to my style of music but there is an excel fix so I am reluctant to sell it because I still wonder what could bring me to arrange a high-end 3-4 more expensive.
A few months later: I keep it because it has a USB port and allows me to register on the computer, I found another function which I touch with its Excellent also serves as a master keyboard (I do not work not Roland).