Yes I do have a comment. Be very careful about switching. I have a 3 Citibank Cards -2 Personal (1 Visa & 1 MC) plus one of the "new" Business Cards (Visa).

My Personal Visa was upgraded two years ago to an unlimited milage card with a fee of about $150/year. When I called Citi about switching to the new offer, the rep was very candid with me and suggested that I not do that as the current card had the unlimited milage feature and they simply do not offer that "product" anymore.

It's worth checking out before switching if you do have the unlimited milage card.