When they were in season, they had the most amazing oranges in the big bags I have ever bought anywhere. I got like six bags and had I known how good they were, I would have gotten six more. I think that the quality of in-season fruit is very good period.
They carry pita chips that I believe only have 2 ingredients that are really good. The chocolate chunks are the same way, super yummy and very few ingredients. Really good in cookies.
The dried cranberries are really good.
I get lots of the organic tortilla chips. The bags are big for the price.
I know some of the items that others seem to rave about are the New Zealand cheese, speculous butters, and the almond milk.
There is another thread somewhere on here where everyone lists lots of stuff if you want to look for it, I think it may be in the To Market thread.
You can also go on youtube and type in Trader Joe's Hauls to get some ideas of what is good.