Is Fan Control Safe for your MacBook Pro?

Im just wondering if Fan Control is safe for your MacBook.
does anyone here have an experience using it?

smcFanControl works fine. It won't hurt anything. You can't slow the fans down below the factory default setting.   
17" 2.2GHz i7 Quad-Core MacBook Pro  8G RAM  750G HD + OCZ Vertex 3 SSD Boot HD 
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