Creo UI is very user friendly and easy to use. If you have experience using it, it works well. The UI wes very complex when it was in the early days. During the old ProE version. People seem to still have the same mindset and not understand that it is changed and improved.
Just look at the pictures of the 2 UI from the picture below and see for yourself.
Creo Parametric -
http://pfiles1.ptc.com/WCMS/images/128470/128470en_image1_1307923080.jpg
SolidWorks -
http://www.caddedge.com/Portals/123005/images/blog_driveworksxpress.jpg