I voted "outstanding". Wonderfully written, great ending to a great series. (Though, I confess, I did not read Books 3 or 4...)
I know, lame.
The scenes with Kirk, the showdown at the station, everything was SO well done! It's almost on par with my favorite TV series. (DS9)
Speaking of which, before reading, the FIRST thing I listened to was the theme from DS9, which fits Vanguard rather well.