Surface Pro 4 and Surface Book go on sale today -- will you buy one?

Surface Pro 4, the latest generation of Microsoft’s popular Windows slate, and Surface Book, the company’s brand new high-end laptop, both go on sale today -- provided you live in the US or Canada. If you live elsewhere you’ll have to wait until November.

Pre-orders have reportedly been brisk, with both devices going in and out of stock. Microsoft says the initial reaction to Surface Book and early pre-order activity has exceeded its expectations, so it’s likely to have limited quantities in store today.

As a refresher, Surface Pro 4 runs Windows 10 Pro and is powered by the new 6th generation Intel Core M, i5, or i7 processors. It’s thinner than its predecessor, and 30 percent faster too. The screen size has increased from 12 inches to 12.3 inches.

Microsoft describes Surface Book as the "ultimate laptop" and says it’s twice as fast as the MacBook Pro. It also runs Windows 10 Pro and can reportedly deliver up to 12 hours of battery life and has a 13.5” PixelSense display with six million pixels. What’s cool is the screen detaches, so it can be used as a tablet.

The device is powered by a 6th Generation Intel Core i5 or i7 processor and features Intel HD graphics, and up to 1TB of storage. Surface Book is also available with discrete NVIDIA GeForce GPU if you require a little more oomph.

There are reasons for and against buying the Surface Book, although of course that’s true of any such device.

Now that both products are officially on sale, we’re interested to know whether you’re planning to buy either of the devices, and if so which.

Please answer our poll, and then leave a comment below telling us why you voted as you did. If you are going to buy either device, please say which model you've opted for.

Note: There is a poll embedded within this post, please visit the site to participate in this post's poll.