I intended to use it with condenser mics and media player on the inputs, and outputting into a a Sony A7Riii to broadcast live. 
 
The Taskam, has many physical controls, you spend less time Chimping into the menus. I like this a lot. It has plenty of feature (pan control, limiter, low pass , perfect for live) 
It has plenty of inputs and outputs. (3 outs, 2 mono in one stereo line 1) 
I like it a lot BUT if you are planing to use it as live loop back to your camera (as it is meant to be) with a Sony camera (A7/III) you are in for a disappointment. Forget about it its a disaster. 
 
There is a serious issue with grounding and impedance. 
 
When connected to the sony when using mics(on the tascam) makes the noise floor will raise from the -90dB internal to --64.29 dB on the sony recording 
 
When you connect a line source ( like a music player) 
Hell break lose: there is a gigantic ground and noise and noise floor jump at -35dB. 
 
Connected to the input of an audio interface , every thing is fine. 
 
So I would recommend this unit but if you are not using it with a sony dslr / line in. (could not test with other brand). 
 
its a shame.. I can't use it