Summary: We used this model for years at a college radio station, because it was the only model that worked properly with the console remote start. We've thrown away about 15 of them over the years. They typically fail after a year and aren't worth repairing.
Summary: A solid player, with many functions. Denon players continue to frustrate me with their search option. It goes either too slow at first or too fast afterwards. I would live with that if the search mode could be muted but it can not, so I must turn down the volume in search mode to avoid going insane...
Summary: So far, it has been an excellent item. I have not purchased a new cd player for a long time. I usually buy older audio from the 1980-90's. This player has ways to customize the functions to your style. It is professional quality, and well built. It also allows you to use a wireless remote.
Summary: I am the chief engineer at a large public radio station. When I took the job here, the 635 was the standard CD player in use across the station. We have around 20 of the things. As other reviews have mentioned, the player does have some trouble with burned CD-Rs.
Summary: I purchased these machines for a couple of college radio stations to replace failing units. I also have an air shift at one of the stations, so I have plenty of "hands on" experience from the user standpoint.