Multi-effect pedalboard and amp modeling / enclosure. Everything has been said on this pedal, successor to the GT-8.
All possible effects are present, and many settings.
Gasworks!

UTILIZATION

Very easy to use compared to the GT and GT-8-6.
Redesigned ergonomics very well - widescreen - 4 buttons under the screen to change everything easily. Menus clear and well displayed on the LCD.
Comprehensive guide (provided you have it in French - can download on Roland cental-europe)

SOUND QUALITY

Effects efficiently. Reverbs too aerial. Chorus, phasers and other beautiful modulations. Wah effective. Delay and parametric equalizer perfect.
Simulations of fretless guitar, synth and sitar are not terrible in my opinion, and was already the case on the GT-8 ...
The sounds of amps are very realistic and very dynamic in response to the game of the guitarist. A real improvement over the GT-8.

OVERALL OPINION

I use it for a month, mostly on a line-out sound system or headphones.
I have owned a GT-6 before a pod XT, a zoom-G7 1ut. The GT-10 surpasses them all. And much more robust than Line6 or Zoom ...
Unbeatable value for money.
I would do without hesitation that choice ...
Too bad the screen is blue ... blue-gray-red is truly kitsch
The GT-8 was much more beautiful ...