Duke is easily one of the top programs in the country. At least last year when I interviewed there, they had 12 positions, 8 for 4-yr combined, 4 for PGY-2. They have an army of CRNAs in the hospital but it works out well for the residents as they get to pick and choose which cases they want as opposed to doing tons of the banal. Because of the CRNAs, you get coverage promptly at 5 or something. Research is also the name of the game at Duke, where they have lots of facilities and money and even more space to expand. Despite this opportunity however, I feel most of their residents were not so academically inclined.
A major strength/weakness of their program is their location in Durham, where you can buy a brand new 3-bedroom home next to a beautiful golf course for about $180,000. That being said, it's in Durham. Also, there are literally about 2 unmarried residents in their entire program, so if you're single and from the big city like me, you're not going to find a whole lot of ppl to commiserate with.
Hope this helps,
Leto