They claim that it wil add an artificial polyA tail and therefore both miRNA and mRNA can be reverse transcribed. This way you should be able to run qRT-PCRs for both miRs and mRNA.
Another advantage may be that you can use mRNA as a housekeeping gene
So far we've been using the AB Taqman miRNA RT kit, which is based on stem-loop RT for specifically miRs.
Edited by mcb, 09 October 2009 - 08:20 AM.