I recently had an LR Baggs lyric acoustic guitar microphone installed in my 2011 Taylor GS Mini. This is one of the original GS Minis that came without electronics but had the internal bracket for the optional ES-Go magnetic soundhole pickup, now discontinued. I had this pickup for a while but was never satisfied with the fully passive design, and so decided to upgrade to something active.
The Lyric from LR Baggs is a miniature microphone installed on the inside of the guitar, stuck to the bridge plate using double-sided tape. Being a microphone it does not suffer from the honky/quacky sound of typical undersaddle piezo pickups, and being placed inside the guitar is much more resistant to feedback than an external microphone. It also enables complete freedom of movement for the performer as there is no need to stand in a fixed position in front of a stand-mounted microphone.