sacd, you said:-"You pay an interest for the borrowed part. Not...

sacd, you said:-

"You pay an interest for the borrowed part. Not much different to a margin loan."

Big difference to a margin loan, interest on a long CFD is payable on the total value of the stock covered by the CFD, not the "borrowed part"
The interest calculation is made daily on the face value on that day.

Also most CFD providors are market makers thus there quite often is slippage against you there.