I believe that the best advice would be to analyze the application that needs to be tested on different platforms and then decide because we used some UI controls that are not yet supported by SmartBear and that involved some coordination to find out the exact coordinates of a control. We received a solution for this, which we use currently. Unfortunately, it only works around 80%.

Sometimes a control overlaps. For example, a progress bar overlaps the item from the list view and a problem will occur. We have some test runs that sometimes are different. We have three test runs for 60 tests and the first time it's green, the second time one fails and so on. It is not consistent, but this problem occurs also because some of the controls are not fully supported by TestComplete. 

I would rate TestComplete a seven out of ten. 

I will recommend this platform, but it all depends which technology the user would like to test. I would like to see a better interface in the future, so my rating for this solution is eight out of ten.