Is this indictment of DevExpress WPF controls valid and what is a good alternative vendor?

Question

My company is starting a major greenfield development project using DevExpress WPF controls. I just read this critical review of their WPF controls:

[…] DevE

Answer 1

I would like to clarify our opinion on usage of our controls in applications built based on the MVVM pattern. At the moment, we are working on a series of examples which should clarify how our controls can be used under different popular MVVM based frameworks (like Prism, MVVM Light and so on). There are a couple of problems in our WPF controls regarding the MVVM pattern and we are trying to eliminate them. However, generally there are no showstoppers that can prevent a developer from using our controls in a MVVM application. Hopefully, our examples, posted on the DevExpress Web Site will convince you in this.