I have been using the Nexstar 6se Mount for about two years and just got it completely changed up by Celestron so that someone else can have the chance of having it.
I have been able to easily get nice 30 second exposures for deep sky objects. I really liked the mount and even bought a Celestron Wedge afterwards to transform it into an Equatorial Mount which let me take 1 minute long exposures, and guiding works great with it, you can use it with the hand controller and a computer.
These are the repairs made by Celestron a week ago:
• Replaced Altitude Motor Assembly
• Replaced Azimuth Motor Assembly
• Replaced AUX&AG board
• Replaced Motor control board
• Cleaned and re-greased gears
• Adjusted ALT and AZM axis
• Completed GoTo testing
• Completed all functions testing
• Completed mechanical testing
Based near Montreal, Quebec, Canada