After running raspbmc for quite a while, I decided to take the plunge and upgraded to osmc (2015.09-2) on my Pi B+. Just wanted to share my experiences.
It is somewhat illogical that you have to go into settings and select a Swedish keyboard layout, even if you have selected Swedish for language.
The documented procedure to transfer your library did not work (Moving from Raspbmc - OSMC). Had to rescan my USB drive with music for songs to show up.
The most annoying bit was that after I installed, XBMC told me there was an upgrade. I upgraded and that killed my HiFiBerry DAC+soundcard? With the original release I just had to edit config.txt (https://www.hifiberry.com/2015/08/configuring-osmc/) and then select it as audio output.
After the upgrade, it was gone. No where to select it, just HDMI and analogue left. The dricver for the card was loaded though (green led on on card). But impossible to select.
In the end I went back and reinstalled OSMC and left it at that.