We did have some issues initially entering our address on MSC's site it kept wanting a state entering but then changed its mind and allowed us to bypass it.
When the balance was due it was about as low as its been $1.20 to the £, still think it was a great deal though. $3715 for 2 adults and 2 children, easy plus and minor packages, two Wifi packs for 2 weeks on Seascape, only i an inside cabin though. When we booked it the price through MSC UK from memory was £4600ish which included premium drinks and gratuities.