When offered a review pass to see the Whanganui show, I was a little apprehensive that I would not like it and would not have anything good to say about it.
Oh boy was I wrong!
The first enjoyable part was meeting Mullen backstage where he was greeting competition winners.
Mullen is a charming wee Scotsman with a wicked sense of humour.
When one of the winners said the show was about to start and we should find our seats, Mullen pointed out that it couldn't start without him.
Once on stage, Mullen seemed to grow from his regular slight height and build into a rock god giant.
Not only does he have Mercury's singing voice perfected, he also has all the moves and he uses the whole stage.
The drum riser doubles as his dance podium and he even did press-ups on it at one point.
Mullen's band - The Works- named after Queen's 1984 album are sensational and Mullen said their first Whanganui show was also the band's 15th anniversary.
David Brockett on guitar seems to have perfected every lick ever played by Brian May and adds a few of his own for good measure.
Brockett provided a great solo as did powerhouse drummer Jon Halliwell.
Billy Moffat on bass and Malcolm Gentles on keyboards also gave it their all as well.
The band looked to be thoroughly enjoying themselves after 15 years together and Mullen gave each band member friendly pats of encouragement throughout the performance.
Even the roadie who came on stage to adjust a mic stand got a friendly pat on the bum.
For me, the highlights of the night were Tie Your Mother Down and Killer Queen but of course everyone loved hearing I've Got to Break Free and We Will Rock You for the encore.
Mullen is not only extremely good at impersonating a rock legend, his stage banter as his own witty self is also very engaging.
He had a (mostly mature) audience on their feet the whole night.
"Be like me and rest when you're dead," he said.