The box is described by this here website like this:
A whole lotta history in one stunning seven disc package featuring
- The Five Studio albums- Sound Of The Underground, What Will The Neighbours Say?, Chemistry, Tangled Up, Out Of Control
- The complete Xenomania B-sides and more
- 'Tangled Up' Live From The O2- Audio Disc (previously unreleased)
All housed in a beautiful slipcase with a hardback book filled with photos, memorabilia and exclusive new sleeve notes.
It's £35, which seems reasonable but that depends on who they got to do the sleevenotes and what the "and more" bit is, really.