Judge Paul Kellar today sentenced Fiddymont after hearing harrowing victim impact statements from the family of the dead girls.
The girls' father Jason Alexander told the Herald after the sentence was handed down: "I am relieved it's over. I'm pleased he didn't get a bracelet, I just wanted him behind bars".
While Fiddymont received "some sort of punishment", Alexander said nothing will bring his two daughters back.
"He could of got 20 years and it still won't bring the girls back," he said.
He hopes Fiddymont will learn from his actions and "become a better person".
"I can try move onto the future somewhat but it's never gonna be the future I anticipated in life. I will never have grandkids and stuff like that.
"I miss the girls everyday but I can still make somewhat of a future," he said
Alexander was the first of five people to read statements in court today.
"Levi when Tayla and Sunmara died I was overwhelmed by grief and wanted to be with them," he said.
"I've had over two years to think what to say to you… I could and would forgive you if this was just an accident… but this was an act of pure stupidity."
The girls' brother Dallas said Fiddymont's actions were "unforgivable" and the crash had impacted all parts of his life - deeply.
He said he went from the oldest of three to an only child "in the blink of an eye".
"It will never change," he said.
"I had to bury my 17-year-old sister and then I had to sit and watch my 15-year-old sister take her last breath ... you did this, this was all your fault.
"I'll never see them flourish, never, all because of your actions."
Tayla's best friend shared her heartbreak at losing her "soulmate".
A friend who had known Jason Alexander for 30 years thanked the first responders for their efforts in trying to save the girls and the lead investigator for his work on the case.
"Levi Fiddymont is a name I will never forget," he said.
He said the driver showed "absolutely no consideration" for his passengers.
"You Levi, are responsible for taking Jason's children ... because of your reckless actions, he said.
"There is no respect, no remorse ... I have watched my best mates go through it all.
"You didn't even show your face and pay your respects (at the funerals).
Because of his speed, Fiddymont failed to negotiate the first bend and the car crossed the centreline before crashing into the steep rock back.
The car spun anti-clockwise down the bank on the other side and Tayla, who may not have been wearing a seatbelt, was thrown from the back seat.
She struck a steel roadside barrier and landed 28m away, dying from massive head injuries.
The car came to rest 3m down the bank and Fiddymont and the male passenger managed to get out.
But Sunmara, who was seriously injured, was trapped inside the vehicle. It caught fire when the fuel tank ruptured and she received significant burns before emergency services could rescue her, the court heard.
The court also heard Tayla sent a text message to her best friend moments before the fatal crash to say, "Bro I'm going to die tonight".
When her friend messaged straight back to ask why, Tayla replied at 10.54pm: "Haven't gone so fast around Port Hills before."
"OMG Tayla!!!!" her friend replied.
The male passenger, who broke his collarbone, ruptured his spleen, and had a brain bleed, has no recollection of the crash.
Fiddymont's lawyer Andrew McCormick said the crash was tragic and the court case that followed had been hard and harrowing.
He explained why his client changed his plea part way through the trial.
He said after hearing the "complex" expert evidence for the first time in full, he changed his plea "quite appropriately" and took "responsibility for his driving" as soon as possible.
McCormick acknowledged the "brave" statements made in court today.
He maintained Fiddymont was remorseful and had good prospects for the future.
"This is simply not something he has ever taken lightly and he never will," he said.
"Mr Fiddymont has wanted to apologise ... since the time it happened."
McCormick said his client was "constrained" by the police investigation and had been advised by friends and family to be "careful" what he said about the crash.
Later on, his bail conditions meant he could not contact the girls' family.
"Mr Fiddymont did not intend harm to anyone that day ... he's carrying a huge burden and a heavy cross he will bear.
"Through me, Mr Fiddymont apologises deeply to the Alexander family."
Judge Kellar told Fiddymont that if he had stuck to the speed limit the crash never would have happened.
"And none of us would be here today," he said.
He said he needed to hold Fiddymont accountable for "this most tragic event and deter others from driving the same way in future.
He set a starting point of four years in prison for Fiddymont but reduced that for his youth, previously clean criminal history, and "somewhat generously" his eventual guilty plea.
"I will never have the honour of holding and watching my grandchildren grow up, this has all been taken from me. I have seen the pain and hurt my parents are going through," Alexander said this morning.