Conversion Optimizer v. Manual Bidding

Hello everyone, first post here.
I've been running a few campaigns and have been bidding all keywords manually. This has been fairly successful.
I've been skeptical of using Conversion Optimizer, but a few weeks ago I figured I would test it out to see how well it worked. It seems that my CPA has gone up with conversion optimizer turned on, and my conversion rate has dropped a bit.
Should I let it play out a little longer? If anyone has experience or input I would love the insight.

See original post by Tim Sanner