I love the concept behind Prepubs and I can see how it benefits both Logos and Logos users. I personally have used PrePubs to build up my collection of Logos resources.
However, the information currently given in PrePubs is somewhat confusing to say the least. I recently purchased the Expositors Bible Commentary on PrePubs only to find that it's price did not increase after it was published (I now understand this because of the agreement that Logos has the Zondervan). I subsequently cancelled my order for the Berkhof collection as I assumed that it since it only displayed the PrePub price it would not increase after publication. However, it's price increased from $119 to $199.
My plea is that three prices (i.e., Suggested Retail Price, Logos Special Price, and PrePub price) be shown for ALL PrePubs regardless of their pricing agreement. This will make it clear to all potential purchasers how much they will save (if anything) by purchasing a resource on PrePubs. They will then able to make an informed decision on whether to preorder the resource or wait until after it is published.