I grew up 20 minutes away from the museum and have watched it's evolution for most of my life.
The most recent expansion has upped the awesome level of this amazing museum, that puts it on par with much more famous museums (looking at you Met). Seriously the Columbus art museum is an embarrassment and fits into the lobby here.
Degas, and all the other super famous artists have work(s) here. But its the contemporaries of these artists that really round out the exhibitions. Sure everyone recognizes Warhol, but how many have ever seen the works of artists he influenced?
And it's all free. Sure you have to pay for parking, but c'mon. Parking is only slightly more expensive than taking RTA and definitely less of a hassle.