Grid Control, soon to be renamed yet again to "10g OEM", has it's place, but I'm not entirely happy with it.

I don't trust OEM's job control system. cron and shell/sql scripts are much more portable and a snap to recover. If you prefer "next", "next", "finish" .. be my guest.

Grid's alerts are really slow for critical up/down system notifications. The agent has to post it's metrics before Grid Control forwards the alert. I'd recommend SiteScope.

On the other hand, 10g OEM is good for database object and ASM management. However, there's a ton of stuff you can't manage with the HTML version. You'll need to get the java version to manage Advanced Queues, OLAP, and a bunch of other components.

I haven't had success doing a DR with the repository. I can recover the db objects, but it had problems reconnecting a different server to the recovered repository. Best of luck with this one.