Is the second receiver from Comag I have. Unfortunately my SL100HD relented not quite 4 years the ghost (Tuner defective). The installation of SL905HD is very simple. However, followed by a rather cumbersome and tedious gimmick to you that has channel lists and favorites adapted as you want them. Is a pre-programmed channel list by Germanic cut, unfortunately for Ö not quite fit. On the manufacturer's site, there is a Channel List Editor for the PC for download, but unfortunately that is not exactly brilliant. Facilitates the creation and sorting unfortunately only marginally. The channel list can then be saved / loaded via USB. Then you could but really still make improvements. Picture quality is very good, response time when switching pleasantly short. A CI + interface for plug-in cards available (when SL100HD there were 2). It is very unpleasant that the USB port is mounted on the rear side of the device. Either you bring a cable to the then lying around next to the device, or you have to fumble around every awkward until you dranhat the stick or hard drive. Why not Fron-USB as the SL100HD? Recording to USB works very well, even in HD quality. Timer Programming is very einffach by direct takeover of the consignment from the EPG list. This is really very comfortable. All in all a very good device with an unbeatable price / performance ratio.