You could use PieSync Health to see: (Choose all that apply.)

The syncing status of a connection.
Which contacts are syncing and which aren’t, including an error message to figure out why.
Your PieSync and HubSpot billing status.
How many new contacts you can still sync this month.

The correct answer is:

Which contacts are syncing and which aren’t, including an error message to figure out why.
How many new contacts you can still sync this month.