-It's been 3 years of use and nothing to say.
Its 2x450Watts/8ohms broadly support the comparison to my amp Peavey PV-2600 and 2x580watt/8ohms and contributed to a significant improvement in sound without changing anything else on my sound system ...
The sound is very clear even with the speakers of dubious quality.
The bass is maybe a bit cold but easy to compensate with a subwoofer.
Reliability issue has never flinched even at saturation limit for several hours.
Be careful in stereo using only the pins +1 / -1 Speakon connectors of the amp if not ... There's concern

Benefits from:
- Providing sound
- The scale of the volumes
- Damping factor high (> 800 Mfg)
- Output level indicators (may be practical)
- Leger (- 12 kg)
- Silent
- Subsonic filter

Its minimum:
- Tendency to heat where my Peavey PV-2600 did not budge.
- Has only one XLR input connectors (no jack useful according to application).
- The connection mode on bridjet Speakon, there have been more convenient.
- Peak limiter absent.

With experience, I do it again this choice. The only regret is not being able acqquérir the model above for a larger reserve of power for large parties but has only paid 400euros for a new product of this quality I'll settle.
Despite the afore-mentioned negative point, I give it a 10.