The 12 year inspection resets the clock but doesnt reset the hours. So if you have plenty of hours left, it will give you another 12 years flying for a little over half the cost of a rebuild.
I too had a 12 year inspection done at Heliair. My blades were out of sync due to replacement under an AD at one year. It was a no brainer as I has about 1200 hours on the clock so I should run to the full 24 years before I run out of hours.