Sometime back I blogged  our experience with Magento + Rapnet combination

http://www.transpacific-software.com/blog/why-we-dont-recommend-magento-for-rapnet

the article enunciated many good and bad reactions on Twitter , FB and G+

The article talks about the pain of integrating Rapnet into Magento. Magento has a rigid structure . Filling up thousands of Rapnet stone data into Magento from backend through bulk uploading libraries like Magmi and then further indexing it is a bulky profess. Add to to it the constant build up of  URL rewrite table, Server getting crashing or script time out during indexing…

As rapnet developers  it would be great if you put forward your experience of Rapnet + Magento