Point count requirements vary, but it is commonly agreed that an overcall using this convention is constructive and should be made on hands that hold the prospect of winning the auction.
When made on very weak hands, the chances are the opponents will win the auction and will have been warned about the unbalanced holding, leading to games that would not have been bid otherwise.
Given that a bid using the Copenhagen convention is forcing for one round, most partnerships apply no upper limit to its high card strength.
As opposed to Michaels cuebids, the 3♣ and 3♦ jump overcalls aren't available as natural bids.
The Copenhagen convention is more precise in terms of uniquely defining the specific suits denoted than standard Michaels cuebids.