I'm using this as a laser finder guide for my telescope. It's very bright and seems to go forever into the sky. The blue beam is very easy to see in the sky even before full darkness to help locating stars.
We used this every single night we were open for operation at East Africa's first dedicated astronomical observatory. The teachers and students together were able to find objects in the night sky rapidly, or use the laser to guide the telescope during our alignment efforts.
WILL light a match six feet away. Went outside at night and turned it on, and it was like having the world's longest lightsaber! Immediately shut it off so as not to attract angry law enforcement or pilots wondering WTH I was trying to do. Happy with it!