A collection with a suitable name. There are loads of T-Rex compilations around, but this is the only one available now that manages to include all the hits from Bolan and T-Rex's entire career, spanning from the days of Tyrannosaurus Rex to Bolan's untimely death in 1977.
Emphasis is wisely put on the 1970-73 period, which was Bolan's artistic and commercial peak, and all the hits are included: Hot Love, Get It On, Metal Guru, Children of the Revolution, 20th Century Boy etc.
This serves as a good introduction to T-Rex, even if it would have been more satisfying with a double CD with a few more album tracks.
However, if you buy one Bolan album, this is a very good option.