Copper stands out because it fits naturally with Google Workspace.
If your business already runs through Gmail, Calendar, and Drive, that can remove a lot of the friction that causes people to hate customer relationship software.
Emails and activity can be connected to customer relationships without forcing employees to manually record every interaction.
I would be less excited about it for a business that does not already live inside the Google ecosystem. The integration is a major part of the appeal.
A customer system people actually use is usually better than a supposedly more powerful system everyone avoids.
Pros
Strong Google integration. Less manual data entry. Clearer view of active opportunities.
Cons
Less compelling outside Google Workspace. No customer system can fix a bad sales process.
My take
For a Google centered business, Copper makes a lot of practical sense.