Thanks for the feed back. Before I retired, I had over 20 years of experience in C++ programming but had not worked in C# or ASCOM. So, I decided to do both by writing a simple utility program in C# to play with connecting to and controlling an ASCOM camera. After getting things working with the ASCOM simulator, I downloaded the latest drivers from the new QSI web site and drove to my observatory to bring my QSI683 home to test. I had heard that the QSI ASCOM driver had problems but, if so, the newest updates seem to have corrected them.
In testing my QSI683wsg-8, the cooling, shutter, filter wheel and image download all worked just fine. Very happy to see this.
I know that SBIG does not offer an ASCOM driver for their cameras and I have seen forum posts that imply the FLI ASCOM support is not good. Since I am also interested in the FLI product line, it would be good to get some confirmation about the quality of the FLI ASCOM drivers. I believe SGP is also doing native support of FLI rather than ASCOM.