Samsung Galaxy Android Marshmallow Update Problems
Expect the Samsung Galaxy Android 6.0 release to bring problems to Galaxy smartphones and tablets. Samsung and its carrier partners will do the best they can but problems always slip throguh the cracks. Even Android 5.1.1 Lollipop, the last version of the OS, was plagued with issues.
This is precisely why we recommend waiting a few hours or a few days even for the smoke around your release to settle. Use the time immediately after an update to gather feedback about the features and performance. Major problems typically emerge hours after an update's release.
Be careful once Android 6.0.1 Marshmallow starts rolling out to your device. Prepare your phone and yourself for the update.