Dave Plowman (News) wrote :-

I'd certainly advise against *buying* a keyless chuck for an SDS - ok I
suppose if it comes for free. Might be worth it if you're a jobbing pro to
avoid carting around an ordinary drill as well. But not for DIY.

My opinion is based on owning the bosch with interchangable chucks for 3+
years. Together with a pair of 12v cordless I cannot see a need for anything
else.
Without the swappable chuck then yes you would also need a normal mains
drill aswell.
As a first purchase for a serious diy'er I could not think of a better tool,
you have sds, drilling and screwing all in the one quality package.

Regards Jeff