Thanks for your feedback. Yes, you right. The ToolStrip themes are horrible (especially the orange theme). We're improving the controls every single day and especially their default themes but currently our main focus is to improve the performance and to fix some known issues (like the scrolling in the combobox dropdown). I hope that in the next weekly build almost all of the major issues will be addressed.
Once again, thanks for spending time evaluating our WinForms controls.