Very rarely I get the chance to fly long haul in business class, but a recent flight to Manchester saw me upgraded from premium economy.
Overall, I found the it a very good experience. Seat wise, although a bit tight for a business, but the ample leg room was a great luxury. Service was very attentive and full marks to the cabin crew that saw me struggle with trying to get the seat down and came over to assist.
I had a very enjoyable flight and the space I had to myself was the big plus for me versus premium economy / economy.