I bought the SH40-60 model a few weeks ago and I'm very pleased with them having done two return trips now.
They are the carbon-fibre shell version but without the Bluetooth input, which I felt I didn't need and added £100 to the price. The light weight compared to my old Flightcom 4DLX can be felt just picking them up and they feel more comfortable after a 1hr+ flight.
The ANR is good at taking out low frequencies but less so at higher frequencies, so the tone of the noise changes. Nonetheless there is a significant drop in noise level when switching the ANR on and we can have the radio at a lower volume as a result.
My flying partner uses DC's ANR headset and there are no compatibility problems. Too early to comment on battery life yet. I ordered from the SEHT website and they arrived in a few days. Nice to see a small UK company doing a good product at significantly less than the big boys.
Cantabrigan
(and no I've not been paid to say any of that!)