By law it has to be 100 proof (in addition to other things). So its not watered down as much as the standard proof offerings, but not as hot as some of the barrel proof/cask strength offerings. It tends to have a bolder flavor than standard proof and tends to be easier to drink neat than barrel proof. Its likely that if you enjoy BONDED whiskey and get used to it, drinking it on a regular basis, you will find standard proof whiskey to be tasteless or, at least, very mild flavored.
Yes, as you say, it has a bolder flavor.
And compared to the 126 Proof Bookers is easier to drink neat.
I'm not a big whiskey drinker, but I like to have some around to take a shot now and then.