"We are not trying to glorify the situation but it is a unique opportunity and one that does not often come a rugby player's way," he said.
"We have had a look at the statistics across the board and they rank pretty highly. They are not a team anyone takes lightly. They're well coached and well organised."
McMillan has made a number of changes to the starting 15 that faced Taranaki in Rotorua last Saturday.
The backline has been completely reshuffled. Nick Evemy starts at first five-eighth, with Lalakai Foketi moving to second five-eighth. Craig Clare slots on to the right wing, Tino Nemani to centre and Elijah Nicolas to the left wing. Top try-scorer Chase Tiatia moves to fullback.
The Steamers' three-win, three-loss start to the ITM Championship has them in third place and comfortably in semifinal contention.
But McMillan believes they still have a long way to go to match the top-ranked sides.
"I know the general public are generally quite happy that we got three wins quite early, which shows there has been some improvement in the side. But we have come up against some of the better teams and have been exposed in a few areas," McMillan said.
"I guess that is to be expected but we also have high expectations of ourselves so haven't been overly happy with our losses, particularly as we have fallen away quite badly at the back end.
"That's not through any lack of effort but it's just an educational thing ... . some sides have a lot of Super Rugby players, who have been exposed to a high level of rugby, and the attention to detail and the ability to work under pressure is where they have some obvious gains.
"I am confident that the guys we have in our squad are more than capable of performing better at critical times."
