Microsoft’s newly announced entry into the premium laptop market has sold out in five days. That is especially impressive since the damn thing hasn’t even been released yet.

According to an article originally published on MarketWatch.com, the 13.5 inch laptop/tablet hybrid device was available for pre-order at the Microsoft store soon after the product’s announcement on October 6th. On October 11th every SKU for the Surface Book had been sold out and consumers could only request to be notified when new stock was available.

As Jennifer Booten points out in her article, being sold out does not necessarily mean that the Surface Book will be in strong demand. It could be that Microsoft produced limited quantities of the Surface Book to avoid the possibility of being stuck with excess inventory. When the original Surface RT tablets were left on store shelves Microsoft was forced to absorb a $900 million writedown.

Still, being sold out is not a bad problem to have. It gives Microsoft some extra marketing muscle which can help to boostbfurther demand as we saw with the Nintendo Wii and the original iPhone.

The Surface Book is a high end laptop designed to compete against the Apple MacBook Pro. Microsoft claims their laptop is twice as fas as the MacBook Pro and the screen can be detached from the base unit for use as a tablet.