Yes - I did have to do a number of unsets for Intermediate IDTA. I have found unsets quite hard previously because my brain likes to have time to fully understand what I have to do before I do it, but thankfully I managed fine in my Intermediate exam. Although many terms became familiar to me, there are some that I still forget, especially ones that get a little confusing.
I actually wanted to do RAD Advanced 1 because most of my life I'd done RAD until my previous teacher decided to do Intermediate IDTA. Although Advanced 1 RAD is hard, I'm not completely foreign to RAD, so it's not too bad generally.