First Retail Group managing director Chris Wilkinson said the "soft" launch was as expected.
"The fact that they are not yet shipping to New Zealand is understandable," Wilkinson said.
"The initial focus will be to establish reliability domestically, ensuring products reach their destinations when promised and consumers enjoy a shopping experience that is reliable.
"This is especially important as products will be coming from third-party suppliers - and delivery partners will take some time to bed Amazon's processes into their workflow and network."
There was a good mix of both global and local brands on Amazon including Kathmandu, Bond's and Lorna Jane, Wilkinson said.
"Interestingly there are no dramatic pricing advantages obvious, so the pitch primarily seems around convenience and range at this early stage. The novelty of this new channel in itself will attract interest and result in sales conversion."
Retail technology developer Cin7 founder Danny Ing said Kiwi brick-and-mortar retailers may not feel the pressure from Amazon until Christmas next year, giving them time to adapt and become an omnichannel offering.
"A brick-and-mortar retailer needs to be connected to the wider market with their e-commerce site and Amazon Marketplace - if they're going to use it, and then connect those to your physical stores," he said.
"If you don't automate your supply chain, you're stuck with processes that require more human intervention, and the more intervention you need, the less scalable you'll be."
Looking ahead to the new year, Amazon expert and e-commerce adviser Hamish Conway said the launch was good news for Kiwi shoppers and sellers.
"Amazon's approach was to find well-known brands with broad-skew range so that they could fulfil their catalogue as quickly as possible, but in many categories there is limited options at the moment," he said.
Making product available to New Zealanders was likely a matter of making some simple back-end setting changes, Conway said.
"It's day one, they're keeping it simple, trying to deliver to Australia - that's their number one priority and New Zealand will be on the agenda.
"I expect that to be sorted within days, if not weeks."