There is a $24 (I think) round trip fare for the taxi from MIA to the Port of Miami. Be careful as they try to overcharge sometimes. I'd rather do a taxi though and pay one flat rate instead of Carnival's transfer for $16 pp.
As for the ship, she is FABULOUS. My favorite hands down. The decor is beautiful, the staff wonderful, the food great, the entertainment always good. At least, when I sailed on her. I had the time of my life.
The Valor can be a bit confusing to navigate at first, but it's easy to figure it out after the first day or so.
Didn't have a balcony room but as quite pleased with my oceanview. It was spacious and the beds are so comfy. And being on the Lido deck you'll have the priveledge of being able to walk right out to the pool.
Hope you have a great cruise. You will not be disappointed!
Thanks for the info. The transfers do seem like they cost more and just easier with a taxi. Have been on other carnival ships and wonder if these balconies are the same as the others. Also do the balcony rooms have refrig.?