Harmer and professional partner Vincent Simone performed a Charleston and quickstep for the 'dance fusion' round on Saturday, earning them 38 points and second place on the leader board
While he enjoyed the routine, Goodman said that the pair chose two dances that fit together easily compared to others.
"I enjoyed the quickstep a little bit more than I did the Charleston bit," he said on It Takes Two. "I thought the Charleston was sometimes a little bit confined.
"It wasn't full of razzmatazz but the mix was very good and I felt that Vincent... last week with his Viennese Waltz that was clever and again on Saturday I thought it was really clever again."
He added: "It was a little bit easier than some though, because both dances are from the '20s. You see Charleston in the normal quickstep anyway, so it was a little easier to fuse."
Dani Harmer and Vincient Simone will dance twice on Saturday's semi-final, an Argentine Tango and American Smooth.
Simone recently tweeted that he is struggling with the choreography, saying: "Still choreographing the 2 dances, feel a bit sick!!! Think I've got PMT !!! X
"I've got too many ideas, need a woman to dance with. It takes two to tango!!! Tried next door, my neighbour is sleeping xxx"
Harmer added: "Well that was a long but very very fun day!! American smooth sorted! Tomorrow Argentine tango! No pressure lol xxx"
Goodman also said that he is not sure whether Lisa Riley should make the final or not.
Strictly Come Dancing continues with the semi-final on Saturday (December 15) at 6.30pm on BBC One.
Photo gallery - last weekend's Strictly Come Dancing: