I am not quite sure what it is with these added strings. After I aqcuired my first seven string guitar about a decade ago I have rarely played any of the six string guitars in my office. For a while I have been fuzzing around with a Schecter Hellraiser 8. It’s great for writing music because it offers so much range and access to weird chords with open strings. But playing it live has little practical value; at least in a band.
Eight strings on an acoustic though are pretty useful because most acoustic playing I do is solo. Lots of space in the low range. This guitar also has a much wider fretboard and so is a lot easier to fingerpick than the Schecter. This instrument comes with a really nice pickup and preamp built in (which includes a tuner.) I thought at first the fanned frets would be hard to deal with but not so. The Agile holds the tuning well and is well balanced when using a strap and playing standing up.