The site's a really good "backup", i guess you could say. Think of it like a factory workshop manual but net based.
For each "page" also comes with a price breakdown, but i wouldn't say the prices are correct but they'd be close for an approx.
Sometimes searching for something can be a bit difficult. For some cars all you get is a choice of Jap, USA or Euro markets. Have to know what your searching for.
Otherwise its pretty useful.