The majority of Sleep/Suspend/Hibernate related issues I had on Windows were related to it either not sleeping at all, or waking up at the wrong time.

Annoying when it's a laptop that you've just unplugged and stuffed into your backpack, and you're wondering why there's now an oven on your back. Less fatal for a desktop when the goal is to save power.

For linux, sleep/suspend is also pretty reliably good in my experience.