We recently stayed at the Westin Tampa Bay. The hotel was perfectly located, the staff was firendly and helpful and the room was fantastic. It was spacious and very clean. The only downside to the entire experience was the buffet breakfast. There really wasn't much to choose from, especially give the price. It would have made more sense to go out and grab a bite.
But other than that, and considering everything, that was a very small thing, I would recommend staying at the Westin Tampa Bay if your headed to that area.