The whole concept of Cranborne Audio is very appealing: building ultra-professional products at a very competitive price.
I was sold on the N22H the first time I heard it. I connected it to the outputs of my digital mixer (A&H QU-SB) and woww... I put on my very well known favourite compilation that I have listened to so many times. But this time I was blown away by the amount of new detail I heard. Some of the tiniest reverberation tails, barely perceptible clicks and smallest nuances became apparent and pristine. I simply did not expect this kind of clarity from my old familiar interface. For me, it was a change from the Behringer headphone amp, which was definitely not in the same league. So you can imagine my delight. Don't underestimate the importance of a headphone amp! I understand that it may be at the bottom of your wish list. After all, you probably already have a headphone amp built into your interface. But dedicated equipment is something else in terms of audio quality. And I am really happy with the A&H headphone amp, which is really powerful and nice. But the Cranborne N22H is a high fidelity device. You can feel it. Look at the characteristics, they are not even comparable with other more expensive headphone amps.
So I bought it as a headphone amp at first. But now I've switched to the Cranborne interface and I'm also using the capabilities of C.A.S.T., which is wonderful. I've got shielded Cat6 cable to carry +48 phantom power from the preamp to the active RNDI. And I get two-way communication with a single Cat6 cable instead of four XLR cables.
Oh, and the mono/stereo switch is a really useful addition when mixing! You can instantly check your stereo field being summed to mono. So you can make your mixes more mono-compatible. Of course, you can also check this on your DAW, but having this switch is really handy.