are diagnostics pack, tuning pack, etc. useful purchases?

the client i'm currently working for is going through the painful/arduous/expensive process of purchasing oracle ee. the current quote included charges of approximately $35,000 for _each_ the following:

o Tuning Pack
o Diagnostics Pack
o Change Management Pack

i haven't used any of these before, and the documentation provided by oracle doesn't lead me to believe these products are worth the price charged.

has anyone used these? were they good? are there other, better tools available? general thoughts?

tia,
tim

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Before you buy. Received on Wed May 17 2000 - 00:00:00 CDT