Somewhat confusing type designation

Before buying I had informed me on the website of Technisat via ISIO S1. The biggest difference for ISIO S is probably the fact that an eSATA port is available for connecting an external hard drive. That's why I was wondering that here ISIO S1 was sold with an internal hard drive. The packaging for a ISIO S in the supplied then there was a device with an internal hard drive and the type designation ISIO S1. However, it is clearly a ISIO S, what is clear from both the housing dimensions, the connections and the hardware diagnostics for registration over the Internet. I paid 439, - EUR. As a result, therefore, ten euros for the doubling of disk space the ISIO S 500 GB to 1000 GB: Technisat DigiCorder ISIO S Digital HDTV TWIN Satellite Receiver (500GB hard drive, internet, DVR, HD +, CI +, UPnP, Ethernet) Black. In Order.

The many detailed reviews I will hardly be able to add to it. I can say that the start-up was very straightforward and that the hard disk whisper deserves the attribute date only. Ten programmed timer, looked at the first broadcasts, delete etc. All with zero problemo. The connection to the Internet was done in a few minutes. So far I have everything so found, as I expect Technisat: Impeccable.

Addendum 02.05.2014:
Meanwhile, I have installed on my iPhone the MyTechnisat App. Absolutely brilliant. Now I can set, delete and change my timer on the move. This is so good that I almost exclusively do the programming on this way. TechniSat has programmed a really good piece of TV 3.0 here.