A station is an absolute must for almost any layout, particularly one designed primarily with children in mind. The interaction and play opportunities presented by the bustle of a busy commuter station or the pleasant slumber of a rural branch line are almost limitless, particularly in the mind of my five year old son.
As far as Hornby station products go, this one is very, very good. At £10 on Amazon it is very competitively priced (in relative, if not absolute terms). The details, particularly the doors and the window features are very good and somewhat better than those on other Hornby station buildings. This product can also be used in conjunction with other Hornby products, as a standalone feature or with buildings from other suppliers.
A small disadvantage could be posed by the chimney pot feature: whilst essential for period detail, I've had to get the superglue out on a couple of occasions as my son managed to break them off with some ease.