rbs6nations.com > Ireland
Stander, 24, left the Blues to join Munster in 2012 and having not been capped by the Springboks, will find himself eligible to play for RBS 6 Nations champions Ireland next year.
And Habana believes the Springboks let the former South Africa Under-20s back row slip through their net.
"Someone like CJ has used the opportunity to come overseas, and take off from where he left off as a youngster within South Africa, and he has really done well," Habana told the Belfast Telegraph.
"It will be a loss but whatever the loss to South Africa it will continue to be Ireland's gain.
"There have been a couple of players who have gone on to represent other countries extremely well, not only in Europe but around the world.
"CJ is a very talented player, he showed a lot of potential and promise as a youngster.
"It was sad to see him leave South Africa, and the Bulls did their utmost to keep him."