Now some words from me too, as in September it will be a year that i have been using the Soundlink.
Mine looks already a bit tattered due to the heavy use. I use it in the garden, we had it at the beach, at home, in the car. The sides got a bit scratched from the transport and the additional red cover that i bought looks already quite dirty (the original grey cover is still like new though, because i have hardly been using it), but the Soundlink still works as it did on the first day. I had no issues so far. In case there was some connection error, i simply reset the device by holding the mute button for several seconds.
My only complaint so far is of sonic nature. The Soundlink sounds best outside at slightly higher volumes aimed at the listener. This is not a 360° speaker, like some other ones. For example the JBL On Stage 400P sounds nearly the same regardless if listened from behind or frontally. The Soundlink has the best sound if it stands at ear-height aimed to the listener. The treble disappears if you listen to it from upside down or sidwards. This is quite a letdown for a portable speaker that i put somewhere but move around it all the time. I have to turn it where I am, otherwise I hear only bass drowning everything else. It would have been nice, if Bose did the Soundlink bidirectional, maybe design it like a lying prism where both sides have their own drivers and spread the sound to both sides upwards. As there is hardly any stereo separation possible from the actual design anyhow, i think a dipole design would improve sound dispersion without compromising stereo effect much further.
The other problem is, that the Soundlink sounds better at slightly higher volume levels. At low volumes in small rooms it sounds boomy and the bass is too dominant. Bose usually adjusts bass response according to the volume and loudness contours which is a good thing. But the Soundlink is quite a bit treble shy to begin with, and Bose doesn't seem to do anything about the treble. They should also boost treble at lower volumes like they do with the bass.
I also think that the Soundlink is a bit too large for real portable use. It could have been even smaller. I am still thinking of some kind of portable version of Bose's Computer Music Monitors. A single speaker could be perfect for portable use, even if it was mono. If you want stereo just connect both wirelessly (similar to the Nokia Play 360°). I tried the Nokia and it is quite big already, overall the capacity is larger than that of the Soundlink but the sound is flat without any bass. A single Computer Music Monitor is about half the size of the Soundlink, but even a single one sounds very mature with deep powerful bass. I even prefer the sound of the Music Monitors over the Soundlink, they just sound more refined with better mids, treble and even a slightly nicer bass which is less boomy than that from Soundlink.
If both were connected wirelessly for a complete stereo-system, you could even gain real stereo separation by separating both speakers a couple of feet.
Meanwhile I have tried a lot of other different portable speakers smaller than the Soundlink and about the size of a Computer Music Monitor or even larger, which sounded much worse, without any bass. I am not a basshead by any means, but there must be some "base" in the music to make it fun listening to.
It seems only Bose is really able to squeeze some serious sound out of small speakers. I haven't heard the BIG jambox yet, but it is already larger than the soundlink (by about 35%) and although it is supposed to have better sounding mids/treble, the bass is claimed to be more deficient than that from the Soundlink.
Although i really like the Soundlink as there is still no better alternative, i also hope for another solution, maybe even smaller. I doubt Bose will announce anything like that anytime soon, but I don't see any other company which would be able to create something really exceptional. Maybe Audyssey, but so far I haven't heard anything from them. I don't count on JBL or Harman as their speakers always sound worse from battery if they are able to be operated from batteries at all. The go+play sounds wonderful when played from AC-power, but from batteries it sounds thinner than the Soundlink. The same story with the Logitech Wireless Boombox, it has comparable sound to the Soundlink when plugged in, but play it from battery and it sounds like a clock radio.
Until then i will continue using my Soundlink, although I would prefer it with slightly clearer Treble.