An excellent collection of 17 games from the definitive RTS series.
The major downside buyers need be aware of is the use of Origin, even buying a boxed copy only gives you a download code for an Origin Account.
If you have reservations about using the Origin service, then avoid buying this and pick up "C&C The First Decade" which contains the original up to and including Generals - Zero Hour. The rest can be picked up separately. The First Decade does not require Origin to use, nor does any C&C except for the new game which this bundle gives early access to.