Originally the machine was manufactured in Canada. It had a very good reputation then which was well deserved. These were known as the type 1 machines. Eventually production was shipped over seas and the quality dropped. It took some time but eventually most of the quality issues were worked out. These were the type 2 machines. If you are interested you can check to see which type machine you have by looking at the label on the motor.
Today I can recommend the DW788 as a quality machine. That's not to say that they don't have problems. All machines can have trouble. For the current price of the DeWalt DW788 I don't think you will find a better saw. The one exceptions to this is the Delta 40-694. It is the Delta version of the DW788. They are nearly identical so I consider them both together. You can often find a better deal on the Delta so it's is something to consider.
Let me say up front that these procedures will void the warranty of your machine if you try them your self. These should be preformed by a qualified service technician. With that out of the way I do think it's very useful to know and understand your machine. Even if you never attempt these procedures on your machine you will have a very high understanding of how the machine works. This can be useful even if you have a tech service the machine.
Thanks Bob for a wonder gift to the DeWalt scroll saw users.
DVD and the 2013, 2014 update DVDs at this link. DVD #1 is $20 and contains over 1,100 patterns. The 2013 update DVD is $7.50 and has another 178 patterns. DVD update 2014 is $7.50 with another 223 patterns.