Open Build Service has always been one of the more attractive features of OpenSuSe, along with Suse Studio.
Unfortunately, after spending some time with the newest release of OpenSuSe, I found it had become very bloated and I feel I will never return to the distribution.
The straw on the camel's back was finding out about the 'tmpfiles.d' or similar. Seems very messy and got me thinking about the direction some of the Linux distributions are going.