3d printed bricks quality?
There have been various questions asked here previously regarding 3D printing, with very mixed results.  Here is a link if you are interested in the responses to those questions.  

https://bricks.stackexchange.com/search?tab=newest&amp;q=3d%20printing  

The experience you are looking for to answer your question is slightly out of the scope of what we generally do here on Bricks StackExchange.  I would urge you to check out this more specific 3D Printing StackExchange site as it would seem more fitting and hopefully more helpful then what we may be here.  

https://3dprinting.stackexchange.com/