The RIPE area objects are probably reasonably good quality but many of the external entries are unmaintained junk.
i would say of mixed quality
There's no real way of telling
ageee
Regarding IXP filtering, if irrdb filtering is a requirement, then it's not really possible to depend on a single irr source. The only practical way to handle this is either to query RADB and accept all sources
there are more sources than are to be found in the radb, many of them of reasonable quality.
or else to allow each connected ixp participant to choose their own set of irrdbs and a source: policy.
i do kinda the opposite. each peer says what irr instance they use and what their as-set is.
RADB includes a large quantity of junk from third party databases and is also regularly targeted by hijackers in the same way that RIPE-NCC-RPSL-MNT is abused.
welcome to the internet. work on fixing the abuse peoblem not jailing the abused; leave that to the american courts [0]. randy -- [0] - http://www.correctionalassociation.org/issue/domestic-violence