We have been using Syncfusion's products since 2005 and I can safely say that you will not get a better suit of .NET controls and libraries. They fully support Windows Forms, ASP.NET and most importantly WPF. They are always very quick to adopt the new technologies introduced by Microsoft and they had WPF controls in the studio very early on. Its one thing having a great product but it’s essential that your support infrastructure can deliver in a timely and accurate manner. Again, Syncfusion really excel here and the Direct Track incident reporting facility in your web login is fantastic. They always get back to you within 24 hours (normally 12 hours but depends on your time zone. I am in the UK and they are in the US) and keep you posted on progress in a very courteous way. I would recommend that you purchase the source code edition of the studio as it is very useful if you want to make your own alterations to a build but we use it mainly for product component protection and it’s a great reference point as well. I asked Syncfusion for a standalone PDF viewer control to be added to the suite a while back as nearly all of the viewer’s available were not native .NET and none were for WPF (without using Windows Forms Host). Syncfusion listened and in the latest release they introduced a Windows Forms and WPF PDF Viewer control which is brilliant. If you’re looking for a .NET suite you really won’t get better that Syncfusion and the support they provide is the best around.