Texas Instruments is selling these for years on the automotive market. In 2004 they decide to give the mass market a go and sice then several devices were released in very short timeframe and as seen many other will to come with many peripherials and features.
PLUS:
Huge internal flash - TMS470 is the only ARM microcontroller line which offers
devices with 1MB internal flash and 64KB SRAM.
Unique HET co-processor which is programmed separately with special language
and compiler for the code ;)
MINUS:
Some members are with only 24Mhz core clock, the newer members are faster
though.
No cache. No DMA.