When reviews of the Surface Book and Surface Pro 4 hit, it seemed like Microsoft would be riding a wave of positive publicity into the holiday season. We liked both devices, and while the Surface Book wasn't everyone's cup of tea, most reviews were also fairly positive. But things changed once they actually reached consumers. Some early buyers reported a variety of issues, including screen flickering, system instability and power problems. Those concerns prompted Microsoft to release several firmware and software updates within weeks (on top of a launch day fix), which helped with some issues. But they came too late to erase the idea that something was up with Microsoft's new hardware.

And one big issue remains for Surface Book and Surface Pro 4 owners: erratic power management. Some users are reporting that the devices simply don't go to sleep properly when you close their lids or put them into standby. Instead, they continue to drain power, which could be a nasty surprise if you don't bring your charger along. That's a particularly surprising issue for flagship devices in 2015 it's something that's mostly been fixed by laptop makers over the past decade. Making things even worse, a Surface engineering manager noted earlier this month that the issue might not be fixed until 2016.
"We are focused on delivering a great experience to every Surface customer," a Microsoft spokesperson told Engadget. "We know a small set of Surface Book and Surface Pro 4 customers are experiencing issues and addressing that is a top priority for us. We have dedicated engineering teams working to get updates and fixes out as quickly as possible and we will continue to use our Surface Book and Surface Pro 4 support forums to share new information directly with our customers as it becomes available."