Yeah it is, Kallax is newer and looks ever so slightly different (just the widths of the outer bits are the same, Expedit has one side thicker) but it looks fine if you have a mix of them both, we got our 5x5 second hand from someone locally, thankfully they're really easy to disassemble and assemble so they're good when found second hand if you can;t get to IKEA. We just did an IKEA order online and paid the £35 delivery, I was fuming as I found out it came from a distribution centre about 10 miles down the road! It annoys me you have to "calculate" your delivery when it doesn;t matter how close you are it's still extortionate! But I just love their shelves so much, we have it in every room in our house except bathroom and kitchen! It's sturdy, modern, doesn;t look too cheap but is very reasonably priced and can hold so much. Because we move so often it's really useful for us.