INotifyPropertyChanged give a helpfull “feature” to WPF+MVVM, but using all those variable names via string is painfull (ie refactoring ?!?!) .
Well, Lambda expression are an easy solution, cute and let writes fluent reading code.
All that glitters ain’t gold!
Lamdba facilitations come with a heavy resource usage: time, cpu, memory.
Here is a blog post, MVVM – Lambda vs INotifyPropertyChanged vs DependencyObject, with some tests and comparison.
Better have a look. 
source: MVVM – Lambda vs INotifyPropertyChanged vs DependencyObject
Technorati tags: WPF, MVVM, INotifyPropertyChanged, Lambda
