Lots of fresh fruit and veggies any day of the week. There are also flowers for sale, a wine shop, hairdressers, and a few other small shops. Additionally there are a number of food stalls with filipino, thai, and other options. In the middle there's a covered area with picnic tables.
It's right in the middle of Kea'au, so if you're doing your other errands, it's very convenient. There is a parking lot.