When I use the Redirection plugin, the page forwards but any query string in the URL is lost.
I mostly use this plugin for landing pages, which users reach by clicking on an email link or banner ad. This link includes a query string identifying the banner ad or email.
When I forward to a new landing page, I don't want to lose this information, so I can't use the Redirection plugin as it is. Instead I have written my own code. However this would be a useful feature, to many other people as well I am sure.