I often order only dwarfs and indicate that if a bonus is offered that it be an extra of one I ordered because I have their other dwarfs. Then I receive a different class of iris. It is like they think if I try a larger iris I will like it. LOL I do sometimes get one I really like.
Peewee is a little MTB that was a bonus and I love it. It has not grown much but its blooms are just a treat.