Migrating ASP.NET MVC 2.0 to ASP.NET MVC 3.0: Best practices, gotchas

We are in the process of migrating our ASP.NET MVC 2.0 web application to ASP.NET MVC 3.0. We do not intend to migrate all views to Razor and I believe it should be alright. But we use a lot of 开发者_如何学编程custom validation - including Foolproof which I want to get rid off as we can implement them ourselves.

So what are your experiences and things that I need to be aware of? I have read this.

My experience - zero friction. Including view template conversion to razor.