You can view a couple of the Hosted Checkout Page demos on a loop.
The demos in Client Portal show not only Hosted Checkout, but the Save Card Details Page, and Beneficiary Account Details page as well. These aren’t on a tokenized loop so you can’t submit a test payment but still pretty cool to play around with.
To get there go to Settings > Branding in Client Portal, or refer to Customizing Your Hosted Page for more details.