There are companies that do not rest on their laurels and Technisat definitely belongs to this group. As the owner of DigiCorder HD S2 Plus, I was able to make a direct comparison between the two devices, and much, though not all, have been improved. It begins with the processing of the receiver. While the HD still a little shaky rested S2 Plus on its feet is the Isio bombproof. The same goes for the sound effects. When HD S2 Plus you could hear very well how the device or the hard drive leapt and the fan made itself felt after a lengthy period. All these problems have been fixed in Isio, so to speak, whisper acts. The reproduction of the programs in both SD and HD is very good and the sound is output without blunders. A real joy is the Isio but especially when you include it in the home network. The receiver enables UPnP not only playback of recorded movies in the domestic PC / Mac (for example, using the VLC Media Player) but also streaming on mobile devices such as iPhone or iPad. The latter, however, can only play movies in SD quality. Smartphones or tablets can be converted without problem with free apps to remote controls beyond. Anyone who has forgotten this can program the recording time of a movie even catch up remotely. In addition, the Isio is streaming all sorts of files from your computer or mobile device to the TV. You can surf with the device also what I but little use, since it is much faster with the computer or iPad. The function is particularly useful only if you want to quickly show some times he visited, what you have found on the net. A Macke has but then adopted the Isio from HD S2 Plus and this is the cumbersome management of Presets. Although there is a program to manage these tasks on the computer, however this is only available for Windows users. Mac users look in this regard in the tube. Here is room for improvement. Nevertheless, I give this unit the full five stars because it has convinced me in terms of quality and features. The Digicorder Isio S is the predicate made full justice in Germany.