Nuisance barking

We have a nuisance barker.  Zara. She drives us Crazy.  In our frustration,
we had considered those shock collars, but they seem so inhumane. A couple weekends
ago, a woman at the local pet store recommended a collar that sprayed citronella
when the dog barks.  Frankly, I was skeptical, especially at $150, but it was
guaranteed, so this weekend I took the plunge.  

Today, I am a believer.  I fully recommend the Premier
Gentle Spray no bark collar
-- it works amazingly well (once you get through the
simple yet surprisingly complex instructions ;-)  Zara has only barked twice
with it on.  Tonight she was bugging me because I had locked her princess butt
out of the bedroom (carpet isn't good enough for her, or so she thinks, and she regularly
abandons me for the bedroom). That annoying bark that says I want something from you
and I'm going to keep at it till you give in.  I went and got the collar, put
it on her, and after pacing for less than a minute, she settled down for a nap on
the floor.  It's a beautiful thing!  And much more convenient (and effective)
than the spray bottle.