Still only 25, the Welsh star is approaching 150 appearances for us in all competitions and has 20 international caps under his belt.
It seems a long way from the youngster who arrived with Matthew Etherington from Peterborough United in January 2000 and Simon, back to his best after a year battling against injuries, is aware of the change.
"It's weird, having been out so long so much has changed," reasoned Simon at Spurs Lodge this week.
"When I first injured my hip all the older players were still here and now I'm back and fit again we've signed a lot of players, the majority very young and I've come back into it and of the 13 who featured against Forest, I think only Robbo, Fredi, Noureddine and Browny were older than me.
"Things have turned around. I've played international football as I'm now seen as one of the more experienced players! I'd like to point out that I'm only 25 though!
"It's exciting times for the club and if we can grow together the next few years could be exciting."
Simon made his debut at Anfield as substitute for David Ginola and played alongside the likes of Sol Campbell, Les Ferdinand, Steffen Freund and Tim Sherwood in his first full season before the arrival of Glenn Hoddle and exciting times in 2001-02 with Teddy Sheringham, Gus Poyet and a run to the League Cup Final.
"That was a great squad with the likes of Teddy, Gus, Darren, Les but these are exciting times again," said Simon.
"Look at our squad now and most of the players have yet to reach their prime.
"People say you peak at 27, 28, 29 and if we all do that together it will be exciting. We have to have that aim to go in that direction."
Simon Davies' role at Spurs has turned on its head in five years - now he's the more experienced player talking about our bright future.