According to the Technical Specifications for my Sky Watcher Dobsonian 12" GoTo Telescope, the Pointing Accuracy is
'Up to 5 arc min'. When new, the accuracy was good to very good, depending on how well setup and alignment was carried out. It was never so far out to cause me to try to measure the difference.
I have now had the scope for just on one year. Over the past few months I have had the occasional session where the pointing accuracy has caused frustration. Last night I had my first chance to run a good test to quantify how much the scope misses the chosen target.
After a very careful setup to ensure the scope was level and the OTA was pointing at True North, I carried out the alignment routine. The result is that pointing accuracy is typically 30 arc minutes (0.5 of a degree) off target. This means that the target is always in the finder scopes field of view but rarely in the eyepieces fov. Some may not be happy with this, but to me this is acceptable as my scope is primarily for visual use. The tracking is fine as can be seen in these rough test images taken last night:
www.iceinspace.com.au/forum/showthread.php?t=100096
How accurate is your GoTo system and are you happy with its pointing accuracy?