Do realize that the HIDs will point lower if there is more weight in
the cargo area of the car.

Do realize that the headlights are adjustable, so if they are pointed a
little low, you can raise them, as instructed in the owner's manual.
Same if they are pointed a little high and you are always being flashed
by oncoming motorists.

Also realize that there is a known auto-leveling sensor problem on some
2004-2005 Prius.  If you have this problem, you'll know it - the
headlights will only aim up to about 20ft in front of the car, and
you'll get a chime and the autoleveling headlights warning icon on the
MFD.  (Several reports on the Prius-2G yahoogroup and on
priusonline.com )  Problem is that it is intermittant and therefore can
be difficult to get your dealer to believe you that there's a problem
(since it often doesn't store an error code and won't happen in the
dealer's possession).  For more information, see:
US TSB EL004-06
http://autos.groups.yahoo.com/group/toyota-prius-sat1/files/TSBs/2004%2B%20TSBs/
EL004-06.zip
April 28, 2006. Automatic Headlight Leveling System Warning Light "ON"
or Flashing. 2004-2005 Prius w/HID headlights. replace rear vehicle
height control sensor with improved one.