Yes, they are great. Timeless songs.
On the radio today, one of the Kemp twins from Spandau Ballet was talking and was saying that being in a band is only about how you look and dress for about 5 minutes. Long-term it's about the songs, and if your songs are great you will endure, no matter how bad your fashions.
That's why (for example) Queen, ABBA, Spandau Ballet, Tears for Fears, Take That and Girls Aloud are timeless, and some of their other more "trendy" contemporaries are not.