One other problem with S&S is that they do not allow any discounts/sales on eBooks. You can get discounts/sales on pBooks from S&S. Bit eBooks, no way. If S&S is going to charge pBook prices for eBooks, then they should at the least allow discounts/sales.
They can't do that because of the Agency pricing model...and before you launch into another one of your tiresome tirades on the subject about how evil it is, let me just point out that the Agency pricing system is actually giving authors a better deal than they've ever had before, with 70% of the eBook price (with the exception of tie-ins, I presume) going directly to them.