Have had two JQi experiences recently, and i wont be going back (to SIN in Y and HNL in J).
Trip 1: Absolutely horrible experience all round in Y, only good thing was the QF FLounge in MEL
Allocated back row of the plane in the middle (no bundle so no seat selection as booked by client). Then told after takeoff that it was a crew rest area and had to move. Aircraft was ridiculously cold, when asked if they could turn the aircon temp up, told 'no sir, you must buy a blanket for $7'. I was in a large coat and jeans and was still freezing the whole way. Crew could not care less, overall experience horrible.
Trip 2: received three emails prior to departure that my APIS details for the US were incorrect, even though i had entered and checked them myself. Rang JQ, got the Phillipines call centre. They told me that all my details were wrong. I gave them the correct details. I receive another email the next day and have to ring back again. Then she tells me that i have to buy baggage. I say 'but is that not included in a business max fare' which completely confuses her. In the end i hang up knowing that it is included.
Sydney J check in a complete farce. Checkin opens 20 mins late, then seems to take about 20 mins per couple to check in. I was travelling with friend, who had booked the return leg on a different PNR to the outgoing leg on JQ call centre. They had put his details in backwards for name, ie last name first. Check in girl says he cannot travel as does not have a valid return ticket. He says 'but your call centre booked it and made a mistake' and she says ' its wrong sir, i wont let you travel'. 30 mins later she eventually conceded that she should change it. This is after she told us to go to the back of the line because we were holding up other passengers!
J onboard is terrible. Significantly worse than QF premium economy. Seats are terrible (sore back), crew chatting loudly and laughing the whole way even though an overnight flight, food shocking, wine average.
They have lost my business. I will actively avoid them on international legs from now on unless it is the only airline flying the route.