I purchased BS 5 / BM 5 in Feb 2009.
First motherboard replaced May 2009, second one in Aug 2010 - both exchanged in warranty. Not one single issue since then.
Update process so far always flawless.
System used up to 2 hours a day, listen mostly in MOTS. I have set up 4 different favorite lists with about 10 songs each. Normally I select one of these 40 songs (all with different flavor) and go into MOTS.
The sound as delivered to BL1/BL2 or BL 8000 is very nice. Most of the files are WMA lossless or MP3 320kbit.
N.Radio works well, radio stations made improvements in streaming rate over the last 5 years.
The system is controlled via Beo 6 (not very strong WLAN antenna) or with various Beo 4s. Sound is distributed into 4 rooms via ML. BS 3200 is master, BS 5 slave. Operation via N.Music or N.Radio is simple and straightforward.
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Although there was some early pain, I appreciate the system, its "electronic tactility", MOTS capability and a nice sound. I appreciate the fact that the system has gained a lot of capability over the period I am describing, therefore, keeping its value. I hope B&O continues to maintain it and show care for the system and its ownerbase...The only thing I am thinking about now is adding CD Ripper to have CD capability in one unit.
Repurchase and recommendation ? Any time YES.