I have few thousand mile experience on Rohloff (mechanical) and it has always worked. I was hesitant to purchase E-14 because the first gen would always some kinks.
When I saw their system in 2018, I was a bit disappointed because the control pad for E-14 is sourced by King meter that manufactures displays for $900 E-bikes. I expected lot more than that. I thought E-14 was thoroughly field tested but it looked like they cobbled up something to fit the product design requirements.
Precise communication between the E-14 unit and Bosch E-drive control unit in a dynamic system like an E-bike is very challenging. Even a small 0.2mm deviation would be exacerbated over few hundred miles with constant shifting of the Rohloff.
Re: service. A company of the size of R&M unwilling to setup a dedicated US office with stationed personnel concerned me greatly. Either they embrace the consumer direct model and adjust their price accordingly or charge a premium AND provide excellent service through their centers and dealers. I agree they have excellent designs but design is only one aspect of the overall experience.
The mechanical Rohloff on my was flawless and worked really well. I am hopeful that any glitches with E-14 would be ironed out in the next iteration.
A company like Trek has thousands of dealers, provides generous credit terms (net 60 to 90 days) for their dealers but in the case of R&M, everything is paid upfront and they charge hefty premium but they are unwilling to setup a US center for service/parts and push everything through the dealer or parts supplier like Shimano/ Rohloff/ Suntour. Then what am I paying the premium for?