Planning my 1st NYC trip in August. We are flying into LGA on a Sunday. If I'm looking at their rates correctly, I can reserve a car from Dial7 for $29. From what I've researched, a cab will cost about that much as well. Any thoughts or suggestions on which would be better, more convenient, cheaper, etc? I'll be traveling with my 2 adult daughters and we'll each have 1 piece of luggage. We are staying near Time Square.