The race to complete Birmingham's new John Lewis in time for the planned opening in September will "come down to the wire".
The team developing the £100 million store opened its doors (see gallery above) three months ahead of the grand unveiling which showed some of the lower levels were still just bare walls and floors while the ground floor lacked a ceiling.
But an upbeat senior manager of implementation Gavin Smith said he was confident of delivering a store that was fully stocked and ready to start selling two days before the doors are due to open.
He said: "It is a tight deadline, the programme is challenging. We designed it that way.
"There are 150 to 200 contractors on site every day. They only have six to seven weeks left to finish. Then my team have about four weeks to get £30 million worth of stock into the building."
He said 600 people from John Lewis stores around the country had applied to be part of a 150-strong team of volunteers helping to get it ready.
"Everybody wants to be in Birmingham. Everywhere I go, everybody is asking about Birmingham," he added.
This is the 20th store Mr Smith has opened and the biggest since the one in Stratford in 2011.
"In terms of what we are delivering, it is as exciting as the Olympics, more exciting actually, as Birmingham has more new concepts," he said.
She said there would be more new concepts introduced in Birmingham than had ever been tried in any other John Lewis store.
"You will see firsts across fashion, home, technology and on the services side. We will try things here and then you will see them appear in John Lewis elsewhere," she said.
The ground floor will feature gifts and stationery, beauty, a Clarins spa, china and glassware and the cookshop.
Cooking smells will waft throughout the floor from the demonstration kitchen and there will also be menswear and accessories including fashion labels Hugo Boss and Diesel which will be new to the store.
On the next floor, it will be womenswear and accessories, shoes, lingerie, personal shopping and a Jo & the Juice Bar.
Third floor will sell lighting, furniture, beds, linens, fitted kitchens, soft furnishings and fabrics.
"This is heartland for John Lewis. It is what we are known for. Birmingham customers won't have seen such a wide offer," said Ms Williams.
On the top floor there will be consumer electronics with "a whole bank of TVs in very size imaginable".
It will also sell travel goods, sports, toys, childrenswear, nursery and feature a haberdashery department for the home sewer.
Ms Williams added: "The top floor will also have the restaurant, Place to Eat, which follows the beautiful architecture of the building.
"You can imagine sitting there enjoying tea and a scone and looking out over the city."
A recruitment campaign for 500 staff to work at the store saw them flooded with thousands of applications.
"We literally had one every minute at first," she said. "We are now in the final stages of assessing those people ready for them starting with us."