[2] Together with Golden Earring, they are considered the most successful Nederbeat band, because they had their best hits charted abroad and especially in the United States.

De Wilde left in 1968 after joining the Dutch army, and van Leeuwen was introduced to Mariska Veres, singing at that time with a club band.

[2][5] Later songs were successful in Europe, Latin America, and Asia, including "Hello Darkness", "Demon Lover" (1970), "Shocking You", "Blossom Lady" and "Out of Sight, Out of Mind" (1971), "Inkpot", "Rock in the Sea" and "Eve and the Apple" (1972) and "Oh Lord" (1973), but they failed to make the charts in the U.S. or U.K. Klaasje van der Wal left towards the end of 1971, following their first trip to Japan (which spawned a live album).

In 1974, Robbie Van Leeuwen quit, and Mariska Veres left later that year, leading to the band's split.

The band attempted another comeback in 1984 and released a new single "The Jury and the Judge" with "I Am Hanging on to Love" as the B-side in 1986.

Drummer Cor van der Beek died on 2 April 1998 at age 49 in Rotterdam, Netherlands.