We have just returned home from a weeks cruise on OV2 and wish we were back there! There are slight differences in the 2 ships, but the food is just as good and the staff are just as helpful and friendly.(You may in fact recognise a few of them). We were also concerned by the bad reviews, but there was no need to be. Personally I think that some people were upset that they had to buy their own champagne on the maiden voyage and that the cold food was just salad.
Please don't worry. I don't think there's a ship in the world that hasn't had a bad review. Even the most luxurious ones have niggles - especially when they are new. Brand new ships seldom sail without a few minor teething problems - probably because it takes a while for staff to settle in and get into the swing of things. By the time you go in July I'm sure any problems (if there are any!) will be ironed out. If it helps, I have a friend that cruised aboard OV2 recently and she's raved on about it ever since.
I wouldnt worry, OV2 has only just gone into service, I'm sure that by the time you come to go everything will be running smoothly, theres not a ship I know that hasnt had problems on shakedown or maiden coyages etc, it usually takes a few weeks to settle down.
We have just returned from OV2, it is not a brand new ship but has been refitted, although we were told when we booked it was brand new.Having said this, we found the quality of the cabin is spacious and staff are friendly and helpful.The only niggle was an unfortunate case of gastral virus which hit the ship a few days before we were due to leave, but even then the ship officers and crews responded promply to contain the illness so minimising the impact on the other passenger.