I've had select 16 year, 15 year, and 14 year. All 3 of them were absolutely amazing. Not only were the notes of spice unique to each bottle, all in their own right, yet at the same time sharing the common ground that you expect to find in Knob Creek. I will always buy any single barrel select I find due the consistent high quality, high content bourbon that maintains nice, invigorating notes of spice while delivering on a clean and smooth heat as an after affect.