The outside of the building was still covered in scaffolding but Mr Fraundorfer said the inside would "blow you away".
"I would be bold enough to say it will be the most sophisticated and outstanding hospital building in the country."
The centre had solar panels on the roof and it recycled collected rainwater.
It has three bunkers and two linear accelerators, which ensured there would always be back-up machines if anything were to go wrong.
Four patients were scheduled today.
Mr Fraundorfer said the new equipment was state of the art, so although the centre's therapists were highly experienced, they had needed to learn to use the equipment.
The first appointments were originally down for October 1 but the quick completion of the first two levels of the centre allowed this date to be bumped up.
"Patients get anxious about waiting."
The first two floors are completed, but work is still being carried out on the last floor.
Mr Fraundorfer believed the rest of the building would be opened in early November. He said contractors had worked hard to make sure the other two floors were completed and safe for the public, which had come at the cost of some delays in finishing the top floor.
Health Minister Tony Ryall said the centre provided dedicated treatment services located right next to Tauranga Hospital's medical oncology unit.
Tauranga treatment cuts travel
Not having to travel to Waikato Hospital for treatment would have made life much easier for Lucille (pictured) and Noel Neustroski.
Mr Neustroski underwent radiotherapy treatment for three weeks at Waikato Hospital last month for a brain tumour.
The Welcome Bay couple stayed in the Lions Cancer Lodge in Hamilton.
Mrs Neustroski said it would have been easier if her husband could have received treatment in Tauranga.
"Not having to travel would be the biggest benefit for people who need radiotherapy."
Mrs Neustroski said she had a niece with breast cancer who had been treated at Waikato, and her parents took turns making the three-hour return journey each day.
Kathleen Kilgour Centre
*About 500 Bay of Plenty residents are referred for treatment to Waikato Hospital from the Bay of Plenty District Health Board area annually.
*The first year of operation at Kathleen Kilgour is predicted to treat 530-550 patients.
*People now being treated at Waikato will continue treatment there due to differences in machinery.
*All new Bay radiotherapy patients will be treated locally.
