These cabins are of a nice size and well appointed. 342 is in a great midship location, just a few steps to the wraparound promenade deck.
The room did get stuffy at times, even with the AC set at its lowest; they measured the temperatures twice, but the issue was more of air flow, with the sofa area adequate but the head of the bed lacking proper circulation (the temperature of air coming out was fine at 17C, but the volume of air was insufficient and the other side of the room was at 23C or warmer). The front desk was very responsive to this, and a fan was brought in. Some may find it a bit less than ideal, others would have no qualms at all, and for us it did not impact the overall enjoyment of the cruise in any way.