Cathay's Long-Haul Business Class product. These seats are great because of the privacy they offer and the fact they turn into a flat bed that's not at an angle like some other lie-flat business class seats. A thick duvet, fluffy pillows and great service. This was probably the best flight experience I've had thus far.
The only downside is that you may feel a little claustrophobic or cramped depending on how big you are.
Interestingly, the seat belts have built-in airbags.
The airlines tagged in this photo have business or first class products similar to this one pictured here.