[KaeseEs]

The last time I used a Keil IDE and compiler (~2007), their linker died if a filename had spaces in it, among many other issues. I was vastly more productive munging the Keil headers with a Perl script to work with SDCC than using the Keil suite designed for the SiLabs 8051.

[sliverstorm]

I guess I can't comment on your experience; I was using their ARM toolchain in 2010.