Question on a radar gun

I'm looking to buy a radar gun and I don't know much about them.

I've got my eye on a Bushnell Speedster Radar Gun sold through 
The Baseball Store (http://vikingphoenix.com/store/sports/baseballstore.htm) 
for $149.99, list price $316.99 and that sounds like a great deal, 
but I'm seeking opinions about that.

06