I wanted a really good, transparent, balanced pickup which I could transfer between my many acoustics, so after a lot of research I settled on one these.
Competitively priced and in my view the best sounding, it combines the signal from a specially-voiced single coil pickup across the soundhole with a goosenecked mic which sits inside the guitar body. With a bit of fiddling around, the position of this can be adjusted for optimal sound balance.
Its only shortcoming is that IIt demands some space between strings and soundboard, so it doesn’t fit my Epiphones. It’s really good in all my other acoustics, but it absolutely loves the Russ Wootton Mahogany S12. sounds great through the AER Acousticube IIa too.