i’m using a tascam dr44wl with internal mics and\or a sennheiser mkh416. i like the fact i can record both internal and external mic. the wifi control from android app is nice in that i can put the recorder in a position and go as far as 20 meters and have control on metering and levels (no wireless audio tho).
this is nice with wildlife, i tried this in the woods early night,keeping a distance allowed me to capture more birds sounds than if i was closer.
other than that the pres are so so, it is a bit noisy and if you want to use internal mics and handle the unit you must buy a rycote audio kit or stuff like that or the handling noise will be too loud.
i like how i can record a decent stereo field and point and zoom with the sennheiser half shotgun for a detailed focus