We sometimes shop at the Aldi just off 288. Limited selections. Prices can be VERY good, but be aware that the sizes of boxed items are generally not the same as name brands in other stores, which makes price comparisons tricky. You can get some good deals on perishables. What makes it really worthwhile is how low the prices are on the produce. Again, not a lot of different choices (they don't have 12 kinds of apples!) and sometimes you need to pick through for freshness, but the prices are likely to be the lowest you'll see.
Definitely worth a look-see.