I used one for a while on my 12" dob. Only used it to get to a bright star before doing a star hop. I was living in a country town with no other astronomers nearby or air traffic apart from the very occasional Police or Ambulance helicopter.
Works OK but a good red dot finder does just as good a job and is far less affected by the cold and cheaper! Once temp drops below about 5deg C, the laser needed heater straps to keep operating.
Malcolm
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