United clinched their 20th league title with a 3-0 win over Aston Villa on Monday night.
The Welshman pointed towards the number of victories United have claimed this season as evidence of a "brilliant season", describing it as "something special".
"If you look at the amount of wins we have had, you have to recognise it has been a brilliant season in the league," said the 39-year-old.
"Some of the performances have been superb. Whenever you win the Premier League it is something special.
"Obviously, if you look at the end of last season that was a huge disappointment. To come back the following year and perform so strongly means it must rank really high. Overall, we have to be happy with the way it has worked out."
Giggs has now won a record 13 Premier League titles.