They are quite bizarre looking seats, aren't they. I sampled them on a Sri Lankan A330 CMB-KUL and found them odd, but perfectly fine for lounging and sleeping. They're fully flat, which is crucial. Just a weird design, and you feel quite exposed in them when sitting up. Definitely *much* better than the ex-EK business class (sold as PE) I flew on the Hi-Fly A340 they ran between AKL and SYD.