I had original OP1 for years and now upgraded to the field version. Though it seemed expensive (actually very expensive to spend 2K just to add some extra features) but it completely changed the workflow. Now it is the most used device in my studio (and outside). First, it has stereo recording (to tape and to sampler) which make this device useful for sampling any synths, modular, vintage samplers etc. Second, it's USB out now works as USB host so I can connect any synth via USB (I have Buchla 208, Prophet 12, Moog Minitaur, Microfreak, several Elektron boxes etc), sequence it and record to the tape. BTW, I found that OP-1f has a much better headroom for recording so it records without any losses in quality. And third, with USB-C it is now so easy to connect to iPad/MacBook or even iPhone with the standard usb-c - lightening cable.