Former National Party deputy leader Paula Bennett has expressed her satisfaction with the length of time taken by the incoming Government to complete its coalition talks but has admitted she's ready to see the three leaders cross the finish line.

Prime Minister-elect Christopher Luxon has been in meetings with David Seymour and Winston Peters for three weeks now in an attempt to broker a deal on a three-way government coalition.

Media speculation over what has been discussed in the talks has increased in recent weeks as the negotiations have dragged on, with journalists jumping at every morsel of detail in an attempt to piece together what might be stalling an agreement.

But for Bennett, the period of time the negotiations have taken is "perfectly acceptable".

"I think it has taken a while, but so it should - I mean, we haven't seen a three-way true coalition before," she told The Mike Hosking Breakfast on Tuesday.

"They've got to sit around a table, we've got a few egos - you don't become the leader of a political party without having strong views and I think they're all conviction politicians, so they believe what they believe."

Bennett said working through everybody's convictions on certain issues "does take time", but noted she's eager for the conclusion to arrive soon.

"I'm ready now. If you remember the time when you'd order a taxi, you'd ring and go 'I'm ready now'."

The former deputy leader saw this coalition as one that would need to tackle a lot of challenging topics including where the economy stood and preparation for the unexpected issues that would likely present during the next three-year term.

She said there was hope the three would be seriously "crossing the i's and dotting the t's" as a result, a process that she believed New Zealand should remember doesn't happen overnight.

Hosking said there was good evidence to suggest there was goodwill between the three leaders, predicated on the fact none of the three had spilled the beans on what had been discussed - showing loyalty to a promise to keep matters in-house.

Bennett agreed there were signs things had been handled respectfully between them.

"You start getting around the table and start to see the extent of what you've got to do - and learn from previous mistakes of coalition agreements, right?" she said.

"It's been 27 years of MMP and we've seen lots of different agreements. Some have worked, some haven't, some have been too detailed and some not enough."

Bennett said the 2017 coalition between Labour and NZ First was a case of Peters getting what he wanted. However, she did believe that when Peters made an agreement on something he did follow through on it.

"If you get that agreement right, it'll look absolutely strong."

On Luxon's negotiation approach, Bennett said the incoming Prime Minister has got "a different set of skills in how he's gone about it", but praised his leadership of the talks as one of the cleaner ones.

"They've been very tight and on the same page, as we see it. Let's be honest - they've gone through every word so they better get it right."