Really good value, at $1.60/KG for a decent product. We used a bag of this stuff, and it lasted ages, and the clothes always smelt nice (Not really a thing I have ever taken notice of).
Unfortunately no free shipping codes that I am aware of, so would have to buy in store or tack on shipping. Would be interesting to see if they shipped 40KG of it for free though.
You may be able to get a 5% off code, above $49, which should cover some of the shipping cost.
Yeah, this is really good product. We've been using this for years.