I'm really excited to try sushi for the time while on my cruise. My son has zero interest in doing this, so I was wondering if a) Izumi is open for lunch b) if so, is the credit the same as for dinner (UDP here), c) any recommendations for a first time sushi experience? I'm sure the staff will be able to advise me well, but I like having multiple input when I know absolutely NOTHING about something. Thank you in advance!