Hi Christina,
I started using TestComplete (TC) at the start of the year on our financial services product.
At the moment I am using TC to test calculations. It is a highly repetitive task of inserting data and checking the totals. Currently I have around 800 tests and growing.
Later I will extend this functionalty to test data input, functional testing and regression testing.
I developed a framework to read the data (test cases) from an excel spread sheet. I have also mapped the UI to the data in a excel spread sheet. As the product I work on is new and the UI is constantly changing; having such a UI to data mapping has made life easier.
At the moment I am running about 450 tests nightly over 2 Virtual Machines and I get the results emailed to me. I can decide which tests to run on which machine easily. I can even run groups of tests.
This is all done easily with TC. I feel I can do anything with TC as long as I have a good framework and a open mind.
I have found the Community to be excellent. I have had no need to post a question, as people have already asked the questions I needed to know the answer for. The help is very good too.