A friend linked me the following article; http://www.lucidimagination.com/blog/2010/01/21/the-seven-deadly-sins-of-solr/.

It’s a great write-up discussing several pitfalls most dev-shops encounter when implementing or maintaining solr for the first time. For example, we are preparing to launch a large project based on Solr and designed the queries to use the standard request handler, but according to the article it’s much better to use the dismax request handler instead. Given that the author’s of the article know what they are talking about, we are going to research the dismax request handler and implement it before launch.