I love TJs. Wouldn't know what to do without them.
The best thing is there are very few (if any) products in the store with high fructose corn syrup, artificial flavors or colors, trans fats, or preservatives. Even the non-organic stuff is better for you than the Safeway equivalent.
Pretty much anything you buy there will be as healthy as you can hope for unless you grow your own food. I know that's also true of whole foods, but the prices are way cheaper.
Their frozen foods are amazing. We've made some for guests who thought we had gotten take out from restaurants. No joke.
I'll admit the produce is a bit hit and miss, but it's decent. Cheese/wine/beer/nuts are all excellent.
Not everything is awesome, but the majority of items are.
I recently came across this website that does a good job reviewing their stuff.