Yes. I don't have to worry about the battery anymore.
Also, I have the 44mm AW5. A smaller one is more convenient for this purpose.
I have a Series 7 and it will give you an alert before bed if it needs a charge to be able to log your sleep activity with enough time to charge before bed. It takes 8 minutes to charge enough for capturing a night’s sleep activity. It’s much better than previous generations. You shouldn’t need two watches with the new one, but it’s really up to you.