Every year, starting in May, I believe, they open the sign ups for the subscription. It's only available as an annual sub, at $348 (at least that's been the cost the past few years). If you pay via paypal, you can pay that amount off in 6 months with no interest, if that's a concern.
If I remember correctly, it's only full size items and the retail value is well over the price you pay. The first year I subbed, the value was well over $1,000. The've sent some very nice items and I agree - I love the lip cream.