The last two points were particularly important to me because I am a frequent business trips and do not always want to wait until the weekend to look at anything in particular. For example: Eight episodes "House of cards" was added on Sunday, charged yesterday in the hotel on the laptop. Took per episode (> 2TB) just under 2 hours. This requires of course a VDSL connection, otherwise the upload speed is not enough. Next you need a VPN-enabled router (here: Fritz box 7390) and a DynDNS access (here: Selfhost).
Otherwise, it is important to say that I come from Technisat Digicorder HD 2, I have nearly six years to good use and was also pleased. An inglorious Intermezzo with Technisat Digi ISO letting times unweighted. When Technisat weak export functions have annoyed me, which cost me a lot of time always. When VU + all is not an issue. You can export the TS files even look the same in the VLC player. This also saves time again.
About the other quality features already been said a lot. I can help nothing, because I have set up the box only for a week. Negative I noticed neither the image (Sony television) or sound (Denon 4308 A).
Also worth mentioning, the all-encompassing support in the internetwork (forum, wiki, etc). Using the wiki I have my G09 (change from D02 to G09 Thanks to the Board notes, went to Sky painless) up and running with the CCAM.
If the box still shows stability, that is running in five years without failure, the nearly 600 euros were well spent.