Review on ARIN by Charles Barney

The organization of information is very well done; it's easy to find what you're looking for when searching through their website or database search tools (which are free).

There may be some room for improvement with regards to accessibility - but I'm not sure that this has been addressed by other companies yet because they don't have as much market share at present time compared to others like VeriSign/Comodo etc., so perhaps there isn't quite enough competition right now? Some people might think otherwise though! It helps me keep track of all my domains' IP address assignments as part of our network operations team duties here @ our ISP provider.