High-performance	Reliability
Ease of use	Value for money

 very good unit, great little system, but the volume control (on the ud-m30 at least) is a rotary encoder that is unreliable (though cheap to repair).. Good value. easy to use., nice piece of kit, very good sound. Nice tool, pretty good stuff. An excellent unit., brilliant little player, one of the best model of denon..., i love the small size and ease of operation. makes a great bedroom system..

 excellent full sound from a small package, very good. Overall a great sound for such a small piece of equipment, good overall, very good.. Works well, it is exactly what i expected. nice, good product. Great device after years of abuse, ser iz goodup , excellent piece of equipment, its users find the denon ud-m31 very user-friendly.they think that is very reliable., they mostly agree on this point. you can look at the denon ud-m31 forum to identify problems that users have come across and the suggested solutions. on average, its users find it much more efficient that its competitors., but their opinions differ slightly. they give it a good score for its value for money you can download the denon ud-m31 user manual to ensure that its features correspond to your needs..

 good, reliable middle of the road system, great hifi with top sound quality - i love it. Good, reliable unit, long lasting, fine product but seems to give reliability issues over time.. It sucks, cd laser failed after 8 years use.. Goood sound but high failure rate , quite satisfied