Under net-metering, will I be credited for power at the same rate the utility charges me for it?

This all depends on the utility. All utilities have different billing structures. In most cases there is a small difference. One example is that they will charge you HST but will not credit it back if you do not have an HST number which most home owners do not have.

For the portion of the power you use as you generate it, you will save 100% of the cost of that power.