In the end, we decided to not go with OODBMS. For us, there were too many cons and not enough pros. YMMV.

>AFAIK any system has limitations and issues while PR-managers claim everything is OK.
>O-R mapping and index lookups are very hard perfomance issues (while they are also development issues). Once we eliminate mapping and most of JOINs does it means we go faster even if underlaying multidimensional storage layer may perform slower than table storage?