Bushman and JMVDL1 are absolutely correct.

I am 60 plus and alternate Bel and Aria.
IMHO Aria, which is a little cheaper, is better value.
Last trip I had an upgrade to a City View room and was very pleased.

Both places are overpriced on dinner or lunch options, so I have taken to explore other choices .There are plenty.

I usually take the tram over to Bel for a visit to Hyde Park to meet up with people for drinks and the view.

If you are going to spend extra money, check out the Wynn before you commit to an MGM property.