Combined with the section above is the classic Usk run. The ledge drop on the LH bend about 100m below the putin can be sticky, but other than this a no-nasties run, with good playholes in flood. Takeout on river right just below the weir under the bridge.
Putin at Llangynidr bridge or from the section above, accessing the river from river-left side of the bridge and parking up the hill on the outskirts of the village. Takeout at the A4077 bridge at Crickhowell: there is a convenient layby on river-right just upstream of the bridge itself.
Rainchasers is best experienced as an app.